I would love to offer another persepctive seeing as a lot of these comments are coming off very judgemental and harsh.
I have been in a committed relationship that i adore and never ever thought or desired to cheat on someone. Our spiritual energies were always so connected and I was on such a high from the relationship. One night I was not thinking and having a good time with my friends and drank way too much and ended up making out with one of my friends. I dont remember who kissed who or how it started. I have flashes of the evening and in those flashes we were talking and being emotional. The only reason why I know we kissed is because of him kissing me on the cheek many times the next morning.
This is not the first time this has happened for me either and it only ever happens when I am black out drunk. Others that have seen me black out drunk have said it is like I am not there anymore and this id or survivalist mentality takes over.
I never wanted to cheat, i am not unhappy in my relationship, and i would have never kissed this person in my sober life. I know my boyfriend doesnt deserve that and no part of me had any intention of making him feel the way he now feels. Because my boyfriend knows my true heart and has seen the scary drunk version of me he understands. But this does not mean it has taken a severe hit to the trust in our relationship and hurts us both severely. Because we love each other deeply, we are choosing to work through it and fight for our relationship.
I do take full blame for the instance because like many said above... if I knew this was a possibility then I should have made a choice not to drink that much in the first place. I could have also communicated beforehand to both my boyfriend and the other guy involved and saved everyone a lot of hurt if this was something i truly wanted. But the reality is, sometimes we are human and neglect important decisions because we want to have fun and get drunk with our friends. And in moments of complete and utter darkness where we dont remember what we "want" becomes something else all together because a lower energy that we carry with us is feeding itself.
When coping with the situation i definitely feel like a part of me (this lower energy) betrayed myself ( my true form or higher energy). It wasnt me making those decisions and i dont remember any part of it. But it was me at the same time. It is hard to know how to move on from it. Like I said above, it will cause a lot of pain and be really difficult to work through. But it can be done if you both have an insane amount of love for each other and want to spend your life with each other. It is something you have to own up to but also give yourself grace for.
Everybody makes mistakes. No ones mistakes are worse or better than anothers. You just have to move forward and learn from the mistake. Make better choices before the instance... or it could mean you lose someone that means a lot to you. It really just depends. I totally can relate though. You are not alone.