Hey P,
Aside from my own problems...let me shoot this bit of advice, if I can. I strongly urge you to view the situation you are in and your feelings with self-honesty. Does it really feel good to chase a guy for affection? Is this want you want to do throughout your adult life? A guy is not worth your time if he can't make the time and committment in return. BTW this guys behavior probably has nothing to do with you; he is probably, as you yourself suspect, just an operator. Be brave, go through the upset, and move on to something and someone that makes you feel happy and appreciated. Good luck and let me know how you're doing. C-