I think the easiest way to deal with guilt and regret from mistakes is to learn the lesson from them that they can teach you. You cannot go back in time and fix the mistake, but if you learn from it, at least it served a good purpose.

You said that you would never have done it if you were sober, right? So maybe the lesson here is to not get really really drunk. Ever. Because it causes you to act in ways that are out of character for you. So you can easily prevent this kind of thing from ever happening again just by staying sober (or even only getting a buzz and that’s it, if you like drinking… but make sure you’re able to limit yourself. Some people have a hard time with that). I’ve had to learn this exact lesson myself. I didn’t kiss anyone other than a boyfriend, but I did end up with a kid with a friend from a one-night stand (COMPLETELY out of character for me). haha. So I had to learn pretty much the same lesson… don’t get super drunk. I can go out and have a drink or two and then I just switch to water or orange juice (orange juice is good because you don’t get pressure from others to drink because it just looks like you’re drinking a screwdriver). An awesome bonus is then you feel great the next day.

So anyway…. allow yourself to accept that you are human and you made a mistake that hurt someone. You acknowledge what you did was wrong and you also know a great way to prevent that mistake from happening again. That is so, sooo much better than those people who make mistakes but have no regrets or cares about who they hurt. THOSE are the people that are terrible and don’t deserve to be with good people. You are completely different. You clearly have felt terrible about it for long enough and I think it’d be okay for you to just let go of that regret and move on from it now. Just make a vow to yourself to not get so drunk ever again.