SUBREDDIT: r/relationships
TITLE: (Update) I (15F) had sex with my brother's best friend (19M) and am now (predictably) confused
POST: Link to the first post

First I just want to say thank you to everyone who read through an commented on my last post, it gave me a lot to think about.

Secondly, he and I just had a long conversation - one that I admittedly wasn't expecting - about the two of us. He basically said that he has strong feelings for me and that I'm exactly what he's looking for in a girl.

That's when I had to pull in what everyone was commenting and he 
agreed. We can't try to start a relationship right now. It wouldn't end happily. So we agreed that we'll make the most of these next 17 days and then see what happens later. 

I'd be lying if I said that it didn't hurt like hell, but I know that in the long run I'll be happier. I'm gonna miss him a lot, too, but he's got his own life to live and we'll be much better as friends.

Thanks again to everyone who gave advice and helped me out. I probably would've tried to start something with him had I not thought about it enough.
TL;DR: 
Talked to him and told him a relationship is bad right now. Maybe in the future - if we're lucky - there can be an us.