My girlfriend and I met up at an “after prom” party, got drunk, and ultimately ending up having sex. What I didn’t know was that she had cheated on me, with her ex, before she went home to change and he didn’t wear a condom. She denied it, even with her best friends siding with me.

—Chris

Aftermath: We still talk here and there, and still “have feelings for each other” but nothing has amounted ever since the incident.

She finally had sex with me after weeks of just handjobs, and we lived together! I flipped her into a position where I saw straight up her nose, which was full of coke.

—jerbear

Aftermath: Stayed with her long enough for her to leave me for someone she met on the Internet. She’s basically homeless now.

It should have been over the day I found out he had created a Match.com account “just to see if anyone would respond.” Fast forward 6 years of never-completely-off / never-completely-sure-if-we-were-on, his father was terminally ill. I feel awful for him and agree to “try again” because he swore I was what was missing in his life, and the only one for him…

—FARM

Aftermath: Reading his father’s obituary, he was listed as having a wife. A what? I sent my condolences to him and his wife via text message, along with the fact that I never wanted to hear from him again.

We were laying in bed talking when his phone rang. He got up and walked outside to answer it. I got up and went to stand by the door to see who he was talking to. I heard him say, “Didn’t you get the flowers I sent you? Well, what? You can’t say thank you?” In the year we had been dating he never so much as took me out on a nice date! I confronted him, and he kept saying, “You just aren’t good enough. You’re not pretty. I want her back.”

—Dee

Aftermath: I left that night, taking everything I had bought for the house. I’m now with a great guy, who thinks I’m great, pretty, and good enough. The ex still calls me from blocked numbers. I guess he thinks I’ll be there when he’s lonely. Truly a loser.

She went to Las Vegas with her best friend. I was wary. My cousin kept telling me she was going to cheat because that’s what girls do in Vegas. I go to her MySpace page only to find a comment from her best friend saying she wishes she could’ve gone. I didn’t hear from her all weekend. She sent me a text on her way home.

—tom

Aftermath: When I asked her if the friend and her had a good trip, she lied and said they had fun. I broke up with her right there through email and told her I knew she was lying.