I need some advice. Big time.?

Ok, so I feel like I can't be friends with a guy without him eventually falling for me. That might sound vain, but I figured that out for a fact different ways, different sources, ect. Some people might find that flattering, but I think its a little annoying. I'm good friends with one guy right now and I over heard a conversation he was having with one of my other friends about him wanting to ask me out. I don't want to hurt him, or anyone at all for that matter. But I wouldn't want to say yes, break up with him, then have this weirdness between us. I don't know if I could risk that. We have to good of a friendship. In fact, if this weren't about him I'd be asking him about this right now. But if I say no, I might hurt him even more. I just don't want to hurt anyone, but I know that I'll have to. I'm so lost right now. If anyone could give me any kind of advice at all, that would be very helpful. Please? I'm so lost. Thank you so much! Love ya!