<human>: Could you distill the essence of the text into 1-3 sentences?

I am a 36 year old male who became amicably divorced about a year ago. Was with my ex-wife for seven years and I wasn't every really sexually attracted to her. Since then, I've had several one night stands (ages range from 21-32) and a couple short-term relationships (no more than 3 months or so). I never experienced the typical 'alpha male' 20s--meaning I had sex with two other girls since I lost my virginity at 17. Needless to say, I am/was pretty sexually immature.

Now, I go on dates, really enjoy the woman's company, charm her pants off and then we end up at my place. We have sex and that's that. A little cuddling and then she's off. 

However, I had a short term relationship with one woman (23 yo) who I thought was gorgeous, smart and talented--basically 'girlfriend material'. Once we started having sex, afterwords, I was always ready for her to leave. Prior, I wanted to be close to her (cuddling, hugging, etc). Then, immediately following sex it was like I lost something. Like I didn't feel any of those feelings anymore. I still cared about her and wanted to see her again but it was like I had my fill of her for that day. We eventually broke up for unrelated reasons and I continued my casual dating. Lately, I've found myself thinking about her more and more (we broke it off back in August 2014). Its not me just wanting to have sex (that IS part of it) but actually wanting her company again. We just started talking again (not romantically) in the last few days; she's a really really awesome gal. And she always thought I was the bees knees.
<bot>: My worry is that if we DID get close again that I will feel the same way if we ever have sex again. I hate that I react that way after sex but its like I can't stop it.