Per wiki policy, Spoilers Off applies here and all spoilers are unmarked. You Have Been Warned.
"Owen, do you like me?" "Yeah, a lot."
- Owen and Abby's first date, it's the first time in the entire movie either of them looks genuinely happy. After playing video games, Owen excitedly offers to buy Abby the sweets he likes so much. Abby, knowing it will make her sick, politely refuses but seeing how disappointed that makes Owen, she quickly relents to make him happy. A few seconds later outside the shop, she's violently ill. Seeing this, Owen's first act is to hug and comfort her.
- When Abby explains to Owen she genuinely has no idea when her birthday is he offers her his Rubik's cube as a present. While she declines, she's obviously touched by such a sweet, kind gesture.
- After Abby drains Thomas at the hospital, she's depressed and goes to Owen's room for comfort. After he invites her in to his room, she crawls into his bed to cuddle with him. He sleepily asks her to be his girlfriend, Abby having just lost her companion tries to tell Owen as delicately as she can that she isn't a normal girl, Owen just thinks she's making excuses to not to be his girlfriend and gets upset. Abby then asks him whether it would really change anything between them to which he replies no, it wouldn't. Abby then agrees, to Owen's extreme happiness and before they fall asleep she tenderly takes his hand and rests it on her face.
- After Owen gets in trouble for defending himself against Kenny, it looks like he'll slip back into being as depressed as he was at the beginning of the film. Only when he sees Abby, he happily runs over to her and proudly tells her how he followed her advice and stood up for himself. Abby looks so happy for Owen and she kisses him on the cheek. Owen then breaks out into an enormous grin after spending most of the film looking either frightened or upset and only capable of short nervous, fleeting smiles.
- When Abby knocks in Owens door he answers notably still frightened of her after discovering her vampiric nature. She requests his invitation to let he in. When Owens asks curiously about what would happen if she didn't get invited, she decides to demonstrate what does happen. When she walks in, her body starts bleeding. Horrified, Owen quickly forgets all about his fear or anger over her and invites her in before hugging her to comfort her. When he asks her whether she would have died if he hadn't said anything, utterly horrified at the prospect, she gently tells him that she knew he would never do that.
- One can speculate that Abby didn't want things to turn out that way between her and Owen. But you can't turn love off. That she risked her life in the hope that Owen would not let her die shows that she is very lonely and that Owen means a lot to her.
- At the ending of the film where Owen and Abby have fled Los alamos by train, with Abby in a trunk. After the conductor finishes checking Owens ticket you can hear Abby tap out the word "Hi" to Owen in morse code, who smiles and gently taps out "Hugs and Kisses" in reply.
- Abby and Owen are on their first date. They're in the arcade and Owen is playing Mrs. Pacman. Abby looks at him, and the moment she looks at him, a song plays in the background the song: In my heart the fires burning.
- Owen sneaks into Abby's apartment that night while his mother sleeps off her drunkenness. When he wakes up the next day, he finds a letter from Abby. In this letter, Abby confesses her feelings for Owen with the phrase I really like you. And Owen smiles happily.
- In one scene at the beginning of the film, Owen is lying on the bed. He puts a hand on the wall like he's reaching for Abby. Abby is right across the room, and her hand is on the wall too. Then her smile widens, as if she knew Owen was doing exactly the same thing.
- As brutal as the pool massacre is, Abby attacked the bullies to save and protect Owen. When she realized what they were doing to him, she let out a cry of rage. Abby put her safety on the line and went back because she loves Owen. After killing all the bullies, she lands right in front of Owen and strokes his face. Owen looks up at her and smiles.
- After Abby kills the cop, she goes to Owen and hugs him from behind. Abby and Owen have already hugged before, but Owen was actively involved, while Abby just stood passively and let herself be hugged. This time she hugs him on her own initiative.
- Basically, Abby and Owen's whole relationship is like that. Both were nothing and became something through their love. Nobody looked after them both (Owen was neglected by his parents and Abby and Thomas's relationship had deteriorated by that point too), but in each other they found someone to look after until that point out that they saved each other's lives.
- Despite everything, it seems that Thomas and Abby did care for each other. The Headbutt of Love they share as a wordless goodbye is very heartfelt.
