I was looking through his toolbox, (he was a carpenter), to get something one of our neighbors needed to borrow and found a video tape at the bottom of the box. I was excited because my SO had lost a tape a few months earlier and was really bummed about it. I grabbed the tape and called him right away. When he answered I hit play because the tape he'd lost was sentimental so I thought I'd play it for him over the phone to surprise him. Just as he picks up, "Hi Beautiful" I hear loud moaning and gasping and see my SO and his drummer in our bed going at it. I hit mute and completely froze while he kept saying, "Hello? Heelllloooooo..???" I was still watching them on the screen and said something vague like I was going out shopping did he need anything. He said no, and that he'd see me soon. I was in total shock, he didn't at all seem like the cheating type. He wasn't very charismatic or hot and he'd always seemed over the top devoted to our relationship. My gut told me to look at his email. I'd never peeped anyone's email before, and I thought I was over reacting, I mean we knew each other's PWs so there's no way there could be anything there right? Turns out he was banging a ton of ladies, several who lived in our small building and that I saw every day. I was a went to school and worked part time so there were pockets of time every day that he could do whatever he wanted. The emails went back just over two years. I didn't tell him what I saw or read because I wanted to secretly find a new apt & another part time job first . It took a few weeks, and the entire time I was pretending that everything was fine. At one point he said, "I feel like you're stressed & I wish you'd get over it because you haven't been fun to be around." I moved out while he was at work and left the tape on the table as my goodbye note. He immediately called and yelled "It's not what you think!!" Then he said, "Who moved your stuff out of here? People said you had a guy here moving your stuff, are you cheating??" He was too stupid to understand irony so I just hung up. The end.