I can't believe it's come to this. I cheated on my girlfriend. There, I said it. Well, wrote it. I have never told anyone. I can't sleep - the guilt is killing me. It was a one time drunk thing - with and old ex of mine. I was a terrible, emotionless experience. And now I am engaged to my girlfriend, and we are planning a wedding and I just look at her and think omg please forgive me, please forgive me, please forgive me. I think I need to tell her. We have been together for 7 years. The incident happened about 4 years ago. But our engagment seems to have brought this to horrible attention for me. I am kind of numb. I feel like I can't move forward until we deal with this. Should I tell her?