I had taken my boyfriend of 3 months on a day trip to Philly. I had already had a suspicion that he was lying to me, so I made a picture from our day together my Facebook profile pic and tagged him in it. Not 3 hours later that night, while he slept, I got a Facebook message from this girl asking me who the guy was in my picture. I told her I thought she already knew. Then the whole terrible truth spilled out: he was using me to cheat on his girlfriend of almost a year. She and I talked online for a bit, me apologizing of course for not knowing. I then woke him up, kicked him out of my bed and my life, and made him pay for both his real girlfriend and I to get tested at our local planned parenthood. I ripped him a new one that I’m sure still hurts him to this day.