Finn moving to undress Rae when they’re making out because he loves her and wants all of her whereas Liam asks her to keep her clothes on because she doesn’t exactly “look like an oil painting”. That’s the difference.
"Stiles is part of your pack. He’s human. But… he’s still part of the pack, right?"
Searching for a boy in high school is as useless as searching for meaning in a Pauly Shore movie.