LTR 3 years. Been arguing quite often lately about completely unnecessary shit. "Why didn't you close the door when going downstairs? Why did you spill ranch on the kitchen counter?" etc, etc. For the most part, I have been ignoring her remarks, but I got sick of it eventually and up and left for the night. Anyway, during that night, I was left wondering why I am even still together with her since she infuriates me to this point. Nonetheless, I got piss drunk (horrible coping mechanism, I know) and met up with some friends. Eventually, I started reconciling with a female friend which led to her full-on performing Oral sex on me. Me being completely shitfaced and realizing what I was doing, I yanked her off while walking away (pants still dangling below my ankles) to my car. Upon entering my vehicle butt-naked she ran up and started apologizing immediately and explained how I am too drunk to drive, so I end up letting her drive my car as she starts blabbing on about how I should go to her friends place with her to sober up. Anyway bad decision after bad decision, we arrive at her friend's place. I collapsed on the couch before more acquaintances started showing up leading me to engage in aggressively drinking again and doing lines with them. Fast forward an hour I'm taking a piss when her friend who is extremely fucking attractive comes in and starts fully undressing while practically staring into my soul. We ended up fucking in the bathroom until I puked all over her and legitimately blacked out. The next morning I woke up feeling absolutely fucking horrible with myself. I don't know how to approach my LTR, I am planning on telling her but I feel worthless because of my bender and sheer stupidity with everything I did that night (all the while having conflicting feelings about our relationship). I am at a halt in regards as to what to do and looking for advice.