The story I'm about to tell you is pretty harsh... just wanted to warn you ahead of time. So here goes...
I was 19 or 20 years old and in college when I dated this girl. We had dated for almost 8 months, when I got a phone call from her roommate (and best friend from high school) that she was cheating on me. She wasn't just cheating with ANY guy... she was cheating with my college best friend.
Oh, was I pissed off! So, after dinner was over (we all lived in the same dorm) I went to my room to prepare myself for what was about to happen next. I sat in there for just about 5 minutes, with my door closed, and got myself mentally prepared.
What happened next was just ugly. I grabbed the chair out of my room, walked down to my "best" friend's room, and knocked on the door. My friend opened the door, and I took my chair and smacked him upside his head with it. He fell to the floor, I threw the chair out of my hands, dropped down, and just started beating on him. He didn't have a chance to even lay one hand down on me. Everyone on the floor heard what was going on, and the floor R.A. (residential assistant) broke it up. He took me down to his room to talk about what happened. I told him exactly what happened, and he decided not to report this to the school (or the police). My friend went to the hospital with a broken nose and cheek bone. He got what he deserved.
Think I was done there? Hell no. I then went up to my girlfriend's room and dumped her like a rock in a pond. I told her what I had just done to the guy she was cheating with, and I told her that she could have him. She started crying hysterically and tried to hug me, and I shoved her down to the ground. I yelled at her to never touch me again, and that I didn't want to have anything to do with her. It was all over at that point.
That was the second time I had been cheated on. I'm not the fighting type, but when I heard about me being cheated on I just blew up. People talked about me beating up my friend for the rest of the school year.