<human>: Can you give me the gist of the text in a nutshell?

I feel so terrible about this. I was very drunk at the time, and was also smoking weed which I don't usually do. Also, I know these are excuses not reasons, but work has been pretty stressfull recently, and I had just had an argument with her at the time. 

Still, I can't believe I would betray her trust in such a juveline way. I was discussing very personal matters that should remain between me and her and saying really awful things about her. How can I deal with this? I feel like such a piece of shit.

I don't even want to ever see my friend again, as I feel like maybe he was coaxing it out of me, irrational though that may be. I can't blame him but I know he doesn't like her so maybe that contributed to me saying those things, I have no idea. I wasn't in my right mind at the time obviously and would never say those sort of things while in control of my faculties, never. Anyway I have blocked his email and mobile and I think it's probably best if I cut him off. I can't bare the thought of him knowing what I told him about my relationship with my girlfriend. It's like the relationship has been invaded in a way.

I don't know what else to do. Looking for advice
<bot>: Said terrible things about my girlfriend, who I truly love, to a friend when drunk and angry with her. Now feel like a complete piece of shit, and that a personal trust has been invaded by my actions.