Another forgivness one, this time Zii forgiving Gary for casually offering her up as a sex partner. Her little speech about it is true◊ and Gary knowing her well enough to make a coy pun shows how much he's growing. ((Also nice in that they both just discussed their problem simply without drama.))
I found Yuki managing to resist the urge to attack Gary's "tentacle" to actually be really heartwarming, seeing as she knew this was a big risk she was taking and finally fighting off the urge to attack him seemed to really show some Character Development.
Gary goes to Amber to confess that he's given up porn once he realized she was an actual person and not just an image on a screen. She assures him that no apology is necessary.
Though, considering that she only does that to get him to eat her out...
Although unlike Didi, who seemed to only want Gary so he could give her an orgasm (she doesn't know about the swirly), and Yuki, who never reciprocates in any way despite showing in early strips that she could, be it a hug or a kiss, Amber is shown to, despite her interest in the swirly-go-round, genuinely care for Gary's well being and for him as a person. The Fridge BrillianceChanelle drops on her helped in that, though.
I actually find that the look Amber gives Gary after he said that shows that she probably REALLY fell for him at that moment.
And a follow-up to that, both Dillon and Amber give Gary a hug (leaving him confused) when he says "Well, it's not like any other girl ever wanted to share my life".
Strip #701, 1/29/13: Best Therapy Ever: Kiley and Matt having sex manages to be strangely sweet.