Your original post reeks of self awareness...some replies of yours further confirmed and reflected that you were fully aware. Recently you've replied with accusations of not giving consent. ..you are desperate to keep your partner in your life because you are going through a tough time and can't bare to lose him or the support you feel he's giving you.
You stated in your original post that things haven't been going well in your life, your relationship has been on the rocks, and that you self sabotaged...that you kissed this guy maybe out of all the hardships you were facing.
This is your original post:
I am absolutely beside myself, I never thought I would do this but I drunkenly kissed someone at my Christmas party, my partner and I have been together 5 years but have been arguing quite a bit lately and I’ve been super stressed as my mum was diagnosed with late stage cancer, I know this is not an excuse I am disgusted with myself, I don’t understand why I self sabotage, I hate myself and I love him so much. Do I tell him? I just know he won’t forgive me and everything going on with my mum I just can’t handle not having him around. - I’m really unsure what do from here.
You were fully aware and conscious of your actions and behaviors. You may regret the situation and your actions, but it wasn't a mistake.
If such serious allegations occurred, why didn't you include this in your original post? Why wasn't the original post about you feeling or knowing some guy took advantage of you at a party, and you feeling that you were drugged??
If these allegations are true, you have no proof, and you didn't help your case by creating the original post... If you were to report and a full investigation happened, your history on the internet, and your technological usage will be examined. .amongst other things.
Your case would quickly be dismissed.
Your partner deserves to know either way.
I am sorry about the hardships you are facing. Please take care of your mental health and overall well being. Perhaps therapy may be beneficial.