A father-daughter version in American Pastoral when Swede and Merry reunite for the first time in five years. Despite all the terrible things that happened between them, they cry and hold onto each other and express their love... and then trouble starts again.
A Brother's Price has several of those. When Corelle, who is a bit of a bully, goes out to face a potentially dangerous group of strangers, Jerin realizes that he does love his sister after all. Also, heartwarmingly adorable with Trini when she takes Jerin's hand and acknowledges their engagement, despite having had "better things to do" than spend time with him beforehand.
In the 2nd book of The Chronicles of Prydain, Taran is yelling at Eilonwy for following them into danger, but when Ellidyr echoes the sentiments Taran defends her. That kind of thing happens a lot where those two are concerned. It doesn't hurt that Ellidyr is the The Rival and an all-around Jerkass.
Dark Lord of Derkholm: Derk and Mara. They seem to be drifting apart over most of the book, but eventually are brought back together, and decide to have another baby (with wings, even).
Played with in Stephen King's Dolores Claiborne. When her husband is trying to drag her into the well along with her, Dolores has a sudden image of her neighbours finding their bodies together and thinking that they committed suicide like this to show how much they loved each other. The fact that people would think this give Dolores the strength to struggle free from her husband's grasp.
In Emma Mr. Knightly and Emma are always arguing or disagreeing about something. However, they both really do care about each other's opinion and are truly the very best of friends.
Happens a lot between Ron and Hermione in Harry Potter. For instance, early on in Order of the Phoenix, after they had spent most of the book so far bickering at each other as usual, Hermione unexpectedly offers to finish Ron's overdue homework (which she almost never does), to which Ron replies "Hermione, you are the most wonderful person I have ever met!"
The Host gives us brothersIan and Kyle who spend most of the story against one another, especially where it relates to Wanda, and it gets to the point where Ian is briefly the main person trying to kick Kyle out of the caves. Just when you think they are going to fall into Cain and Abel territory, they get moments that reveal their bond and love for each other.
Howl and Sophie in Howl's Moving Castle. The sequel outright says that they're happiest when they're bickering, but when they're reunited at the end of the book, Sophie glomps him. Also, Michael had commented to Sophie that the day Howl forgets to take two hours every morning to perfect himself would be the day that he has truly fallen in love. So when Sophie gets kidnapped by the Witch of the Waste, Howl arrives to rescue her looking like absolute, bedraggled hell.
Katniss and Haymitch have one of these moments in Mockingjay, the third book of the The Hunger Games series. Katniss breaks down crying because she is upset over Peeta's capture and torture at the hands of the Capitol. Though she could have asked for just about anyone, she only wants to be comforted by Haymitch. Haymitch, who is usually a Jerkass, sits down and consoles her.
Bertie Wooster and his Aunt Dahlia in Jeeves and Wooster are a non-romantic version of this; they bicker and snark constantly, but when matters turn (relatively) serious, they quickly rally around and support one another.
Kidnapped has Alan and David, who frequently have disagreements, but are still good friends.
Shadow and Déaspor in Murderess have their moments, in between comedic fights that almost lead to death.
Buttercup's parents in The Princess Bride. They bicker so much that they keep score, but when Buttercup's father feels that his life is so sufficiently complete that "now [he] can die," his wife looks at him fondly and replies, "Don't." The narration further states that when he really does die a few years later, she dies almost immediately afterward, with the majority of their acquaintances being of the opinion that it was the 'sudden lack of opposition that did her in.' (This does not apply to The Film of the Book, where Buttercup's parents are neither shown or mentioned.)
Near the end of Red Moon Rising (Moore), each member of Danny's family individually come to peace with what he's going through and show their love for him in different ways. The most blatant is Paige, who writes him a letter talking about how lame everything he's going through is and that she hopes he'll be okay.
Tal and Milla from The Seventh Tower book series. When they first met they alternate between wanting to kill each other and fighting about their cultural differences, but when it comes to what matters they work together very well and by the end they had a strong bond of trust and friendship.
The Sisters Grimm is the definition of this trope. Sabrina and Puck spend most of the time together arguing. When they're not arguing, they are giving each other silent treatments. Puck frequently tells Sabrina that she's ugly, but then, when he finds out she's experimenting with makeup, he tells her that she doesn't need to wear it.
Alanna and George in Song of the Lioness. George has made his feelings known to her, though Alanna has been avoiding talking about it, thinking it might ruin their friendship. But when they were on a trip and George was badly wounded, she was panicking, begging him not to die and not moving from his bedside the whole night until he woke up. Appropriately, he's the one she chooses in the end and they end up Happily Married.
George: [teasing her] I didn't know that you cared. Alanna: [wiping her tears] Of course I care, you unprincipled pickpocket! Of course I care!
The novels take Han and Leia's moments from the films further. Whenever they're together it's hinted at, and in The Courtship of Princess Leia finally results in Han winning a planet in a game of Sabacc to give it to Leia as a gift in a fit of jealousy after the Hapan Consortium offers her a shitload of shinies to marry their prince. This doesn't work, so he kidnaps her, takes her to the planet and makes her a bet: if he gets her to love him in seven days or less, she has to marry him. Of course the trip goes horribly wrong but she does end up loving him and they do get married. Later books show that they have kids.
In Razor's Edge, set just before The Empire Strikes Back, for all of their bickering, Leia trusts Han implicitly and completely, which Han himself is startled to realize (she's glad the Millennium Falcon is going to be their backup ship, because she trusts Chewbacca, and by implication his partner). She never once considers that he might be the Imperial mole; among the crew of Leia's ship, only General Willard himself rates the same consideration.
In Tales from Netheredge, Queen Verne has a strained relationship with her uncaring and unfaithful consort, Prince Charna. However, when they find themselves in the clutches of a sadistic usurper, she is horrified at the prospect of her husband being abused in front of her, and Charna feels very protective of her as well, surprised that she cares this much. After the crisis is over, Verne genuinely looks forward to their reunion.
The whole point of Mil Millington's Things My Girlfriend And I Have Argued About. Though the protagonist and his girlfriend live in a state of open war and have raging argument down to a science, it's really just surface noise; their relationship is the most solid one in the book. This is based on the author and his girlfriend's real life together, which he describes as "The secret to happiness is to become irretrievably embroiled in a bitter fight to the death."
In Joyce's Ulysses, the last chapter is the main character's wife's internal monologue. She's ordered him around and cheated on him through the whole book, and portions of the monologue are her debating whether to leave him or not. But the word "yes" keeps popping up even when not warranted by the sentence. In the last lines, the reader discovers that she's stuck on the word "yes" because she's remembering the day she accepted his marriage proposal, by saying "yes, yes I will, yes."