so guess what

It's because of crap like this that I have a hard time trusting anyone in a relationship. I'm sorry that happened to you bro. I was in the same boat once upon a time. Except she didn't tell me - I found out the hard way.

Sounds like she wasn't who you thought she was and isn't worth it. Let it go. The sooner and cleaner you can do that, the less baggage you'll carry with you.