<human>: Can you condense the text into three sentences or less?

Last Friday I had a house party with a keg (close to 50 ppl).  My girl of seven years who I have never cheated on could not come so I was going to enjoy my self and drink a lot with my friends.  My buddy who I have know since I was seven shows up with his girl friend (let's call her M) who has always been flirtatious with me.  Something that never bothered my friend or my girlfriend, we just took as M's way of flattery.

Long story short I get blacked out drunk and am put to bed.  I wake up in the middle of the night and M and I are having sex.  I immidiatly stop and begin to freak out.  She starts crying and begins to apologize.  I asked her what happened and she say she came into my room 5 minutes ago naked and jumped under my covers.  I must have started having sex with her not realizing who i was with.  I am still extremely intoxicated and do not remember much except saying that her boy friend is going to kill me and that my girlfriend would never forgive me (her parents divorced due to her father cheating and I promised I would never hurt her like that).  She stumbles out of the room. And I fall back asleep.  I haven't eaten in 3 days and I started crying at work today. I can't take the guilt but it's something I would have never choosen to do.  The worst part is that my girlfriend, M, and M's boy friend all work together at a small start up company and that if this got out the company would fall apart because they are management (or atleast it seems in my head now). I can't tell my gf or 20 people would lose there jobs. I can't stop crying.  Sorry I am on my phone and don't know what else to do.  I think I might have to call my mom.  Please give me advice.
<bot>: I woke up in the middle of the night blacked out drunk having sex with my best friends girlfriend. If I tell anyone about what happened, the company they work for will no doubt fall apart.