<human>: I [M15] have always liked girls, both physically and emotionally. About a year ago I thought that I might be attracted to guys, but I quickly dismissed that, realizing that if I had been, I surely would have noticed it by now. But recently, I have become good friends with another guy [M16], and I realized I was starting to develop feelings towards him, physically and emotionally.

 I think he's funny, smart, and cute, but I have only ever felt this way towards girls before. My first question is if this makes me a bisexual. I know 100% that I'm attracted to girls, but this guy has made me start feeling those feelings, but towards him. It came as a surprise to me, and I feel like I could talk to him about it (he's gay, but not super open of it). Should I go ahead and try and talk to him about it?

Also, if I do want to try and get into a relationship with him, what do I do? I've always been good with making friends and such, but I'm horrible when it comes to romance. I know that I definitely do like him, and I don't know if I should tell him that, just let our relationship goes where it wants, or what. Does anyone have any advice?

Can you summarize the given text in a few sentences?
<bot>: I realized recently I like my friend, should I tell him about this, and if so, how would I develop the relationship?