I seem to have a thing for older men... what should I do about it?

I've always been into older guys, and no I'm not talking about grandpa's here. Anyways I'm 21 years old, and the guy I'm interested in is 36. He's extremely good looking, and quite the charmer. We've really been hitting it off, but I've just been questioning whether or not a 15 year age gap is realistic. I want to pursue something with him, I'm just not sure if I should. I've tried dating guys in and around my age, but I'm never very interested in them. 10 points for the most helpful response