Did he finally realize that he cant go on without lee? And his actions before like being cold is that he is on stage of indenial and dont want to accept that he was inlove with lee and just forcing himself to be with pink haired guy?
And now that he finally somehow accepted it, he want to somehow show his feeling though he is just kind of not fully sure or something like that? Whether he trully like him or not thats why he is starting to show some nice approach?