@ez3 He initiated a kiss in chapter 41. Yes, he was hesitant. Yes, she brought her face very close to his first. But when they were making out it was as a result of him bringing his face to hers. Sure, they were/are both in a very bad place, and one could argue they're trying to console each other, instead of it being a romantic relationship, but I mean, either way, his actions are inappropriate. Hers can be excused by the fact that he's an adult and consented to this.
Not quite sure about laws over there, but I'm pretty sure she's still a minor, so consent should be out of the question. He's the adult, he should know better.
I mean, I also sympathize with the guy, because he's clearly suffering, but it ultimately shouldn't excuse his behaviour, at most explain it. And yeah, maybe the girl is almost an adult, but the line has to be drawn somewhere. And it can't just be shifted continuously.