is this wrong?

Ex's bestfriend, or used to be best friend, I'll call him S so this doesn't get confusing. But anyways, They don't talk anymore ever since my

Ex started dating this new girl. But I hang out with S a lot because he just really gets what I've been through, he's just always had my back on things and understood me. Last night we went hung out and it just

Felt different. Like, I like him. And I think I like him a lot. After he took me home he texted me saying he's liked me for a while. I was in complete shock because I thought he wouldn't feel that. But he did. And after last night.. honestly I haven't felt that happy in a while, I haven't laughed as much as I did. What if he's THAT guy? You know? Is it wrong for me to like him...? Does that make me a "homie hopper"? Another thing that's making me question it is that I'm friends with S's ex. We aren't  like best friends, we hardly even talk to each other. Would this still be wrong?