And by the time we get to season 4 it’s developing.
There are two episodes where the characters get together. One is a kind of a “What if?” episode, which is brought on by a spell that Willow casts, which is completely unreal. But then there’s a scene later on in the season where Faith takes over Buffy’s body and just messes with Spike’s mind. And there we see for the first time that if… That Spike would have gone for it. He would have very much liked to have kissed Buffy, and that’s why he can’t kill her. But he’s in love with someone who’s truly good, and so he’s going to try and be the kind of man that Buffy would like to have.
(Source: cilllianmurphy, via shewhohangsoutincemeteries)