Soooo my ex-gf(ann), broke up with me monday because "she felt stressed being in a relationship" so I said ok, that's a pretty just reason. Well it turns out she left me for some 21 year old guy that works with her..... I got used the entire time I was going out with her and she was cheating on me with guys at work the entire time..... wtf....
Had the same situation, found out one of my ex's had been sh*ggin her co-workers in the store room at work. I was older than her but she was going with like middle-age men, think she took the "sleep your way to the top" thing way too far.
Things happen, just make sure you get your own back and don't get details on what happened cos I did and it made thing's 10 times worse. You'll find another bird, it's easy for ppl to say not give her a 2nd thought but if it's been going on for a while it's hard [get me with the psych lol].