How can I become more emotional when it comes to dating and women?

Im a 20 yo guy who is struggling to connect with my emotions and building feelings for women to furthering into a relationship. Im good looking/funny/smart ect ;), so I have pretty much had things come easy for me with most women which has kind of numbed me a bit and has become routine to meet a girl, have sex, and try to avoid her at all costs. Why do I think like this? I try to be a good guy, but after sex comes, my feelings shut off, I want nothing to do with the girl, and Im on to the next statistic. Help, I dont want to be a lonely old man!!