I found out about one after-the-fact. I was fuckin with this chick for about six months, then we let go of a relationship goal and were just friends (she was super religious, vegetarian, and didn't drink and I was the polar opposite of all of that). One day she calls me up crying about her man breaking up with her after they had been together for 4 years.
Six months of those 4 years they were together she was carrying on with me trying to make a relationship work together and fuckin the whole time.