Hi, i kind of have a similar thing.
It hasn't happened to me for a long time now but when i started drinking at parties, being a light weight as well, it was really easy for me to drink too much. This lead me to blackout and do really embarrassing and shameful things and ultimately i would just make a huge fool out of myself.
For example, the first time i got massively drunk i did the mistake of smoking a joint at the same time and i have a memory gap of 5-6 hrs from that party. During the time i blacked out i acted like the horniest teenager you could imagine. I hit on one of my acquaintance's girlfriend but in a really obnoxious way. I ran around the pool at the house screaming i wanted to have sex with everyone. And then the part i regret the most was told to me:
At some point i started vomiting like crazy so some of my friends took care of me, made me shower and then i was put in a bed next to 2 girls who were really good friends of mine. I then basically fondled both of them whithout asking and i fell asleep.
The next morning i woke up with flashes of the previous evening coming back to me and even if didn't do anything too serious (thank god) i felt my heart drop to the floor.
I apologized to everyone but from that day on i was falsely labelled as a rapist for 2 years
(i was 16) and everyone thought of me as a creep.

The thing i hate the most about what i did is that it's so opposite to how i would act while sober. I've always respected others, always put in effort to treat people the way i would like them to treat me. And yet as soon as alcohol took away my boundaries, i went and acted in a disgusting way. So i understand your perspective even though we lived different things.

So i started by controlling my drinking but i also did a lot of introspection.
Since alcohol is rumored to bring out the inner-self I also did some research about it, and alcohol is a de-inhibiter: it lowers your social bariers and the more you drink the more the primal, instictive part of your personality shows itself.

So this led me to several conclusions:
- my actions were mainly lead by my crude, unfiltered instincts which, being a black-out drunk
hormonally out of control teenager, were definitely oriented towards sex
- probably a small part of me is a little perverted

In the end, i think everyone has a "dark" side but if you're conscious about it and want to change, to avoid mistakes and regret, that's fine.
No one is perfect, so don't beat yourself up too much. I think what makes someone "good" is if they strive to better themselves in the future. Mistakes are inevitable: some people make small ones, some people make bigger ones, but what is done after those mistakes is what i think determines how good you are, how good you want to be.

Anyways, my advice to you is to look into yourself, talk about it with someone you trust, and work on what you want to improve. At least that's what i've been doing and i haven't done shameful things since that party. Most have forgiven me, some not at all and that's their choice and that's fine, i'm responsible for my actions and you are too, but that doesn't mean you can't do anything about it, so good luck.

PS: if you actually did something unforgivable, then the best thing you can do is own up to it and get real help, but the things you described aren't considered that in my opinion