<human>: Can you give me a shortened version of the text?

I know this sounds sick and crazy, but it was something I always fantasized about doing, ever since I was cheated on by one of my ex girlfriend. I never had an opportunity to do it until now. I really love my girlfriend and I want to spend the rest of my life with her... I just wanted to get it out my system now. 

Anyway she found out while going through my phone when I was sleeping. She suspected something was up.

She knows we had sex but not exactly sure what we did. I told her we just did oral... Should I give her all the details? Will it do more harm than good?
<bot>: I still want to be with her so what I tell her must not be jeopardize our future. I don't mind taking the guilt upon myself.