I'm in the exact same situation... It's really hard, because he's really nice to me, and sometimes he says things that keep me up at night thinking; What did he mean by that??
All i know is that...
i understand this whole situation because i feel the same way.... first you have to decide if you actually love/like him or you just have a little puppy crush. if you love him, then that means that...
Before ruining a friendship talk to your friend about it first. Tell her your feelings and get her opinion. After all, she knows her brother way better than you do. She may give you some really good...