Usher, I suppose. D:
Alpha) A man you're heavily infatuated with, is insanely hung (let's say 9x6.5), treats you like any other random acquaintance and clearly isn't into you. He's a social butterfly and always exciting to be around and seems to be well adjusted... outside of a painkiller and pot addiction.
Beta) A man clearly infatuated with you, is pretty well hung (let's say 8x6), treats you as well as he would a lover, but requires a long-term committed relationship for anything sexual. You only see him as a friend, though. Not to mention, he isn't always the most sociable.
Did I suck the fun out of it? ;p