#man actually

Okay so there's this guy, I've liked him for months but nothing's ever happened. Which is okay, except I'm starting to think that maybe he likes me too. The issue is, he's my good friends older brother and I don't think she'd like that I like him or if anything were to happen. A different friend thinks she'd be okay with it "if [my] feelings were genuine", (which they definitely are!) but I'm worried. What do you guys think? Anyone else seen the outcome of this situation themselves?