Are We Destined to be Just Friends?

I have a question, and I would appreciate answers from men. Do you like it when a woman lets you know that she’s interested in you? How do you react when she openly flirts with you, and lets you know that she would like to get to know you better? (This assumes that both of you are single and not involved an another serious relationship.)

I ask because I’ve been throwing out friendly “hints” to someone for a couple of months and he’s really not picking up. When I see him in social gatherings, he seems interested, and we chat sometimes via e-mail and Facebook, but he hasn’t yet asked me out. I’m told I am attractive, sexy and charming, and I know I’m intelligent. I know for a fact that he isn’t gay, so what’s the problem? Is he afraid to ask me out, or do you think we’re destined to be “just friends?”