<human>: Just did one night stands until ex, she was young and about as inexperienced as I was with the whole relationship thing. 

It was a bit unorthodox, but she quickly more or less moved in for the duration we were together, which was only about 3 months, but we were about as clingy a relationship as I've ever seen. We made 'clingy' as portrayed in movies look completely normal.

Anyway, she moved away to college and we knew we were gonna have to call it quits, but stupidly agreed to try long-distance. We talked/skyped whathaveyou for every day, but it slowed, until about 1 month later, I got the call saying she is with another guy. 

I didn't take it well, even though we both knew it wasn't gonna work out, I guess I was bitter that she beat me to the punch. 

It's been about 6 months since then. And I can't look at women the same anymore, when I catch someone smiling at me in a bar, coffeeshop, whathaveyou, I just get sad. 

Since then, I've gone on dates with 2 different women (both in their early 30's) and have only had two one night stands on top of that. 

The dates ended unimpressively, once in meaningless sex, the other just calling it a night and mutually parting likely for my obvious lack of interest. 

And no, I'm not confused about my orientation. 

I enjoyed being in a relationship, but seems like I won't ever be able to get back into it. 

Also, atop all that, I seem to attract more married women and women in relationships more than anything else. I'm disgusted by the notion that they want to cheat with me, but to be honest, sometimes I've just been on a dry streak long enough to not care about it. I'm not sure if married women are attracted to sadness.

How do I fix my brain?

Summarize the given text in a few sentences.
<bot>: broke up with ex of only 3 months, but was first gf. Now I can't establish a connection deeper than skin-deep with women for some reason. How can I fix it?