Damn What The Hell Is Up With Me?...

What the hell am I becoming, I am making some of the most stupid decisions I have ever made in my life. I just cheated on my dude and I feel bad, but not bad enough to tell him. Or maybe I feel bad, but I'm just too scared to tell him because I don't want to see the outcome of the situation. I have no idea as to what I should do, everyone who knows about the situation believes that I shouldn't tell him, but I feel he has a right to know. I feel guilty but not guilt as hell, I'm just so confused about this. Why must this happen now? I thought I was doing good...