ash's question (2)

So like this is my first relationship at 23y.o, so my partner before we confirmed our feelings for each other and made it official, we went to a pool party two days before and got super drunk and high. The issue is I have a a bad habit of kissing people on the cheek whether they are nice or not, so this guy let's call him L, he is a cheater and flirts with a whole lot of people he was there at the party (he was lowkey interested in me but not really) and I have bitched about him with my partner before, but idk what happened few days ago my partner heard that I kissed the L guy, I have 0 memory of doing that like none at all and one of my other guy friend also said that L has a video of me kissing L on the cheek apparantly (i personally have not seen the video).
My partner is very sad to hear that I kissed L , they said we shared so many romantic moments together and did so much and i talked about my fear of being cheated on and stuff. I honestly don't know how to react to this, is this cheating idk i really do like my partner and we've been dating for almost a month but rn it's long distance.
Please suggest me something so that I can come to conclusion and talk about this clearly cuz i really don't know how to react to this situation. I'm so tired of feeling guilty when I myself don't clearly know what I have done when I was drunk even my partner doesn't remember most of that night becuz we were so damn drunk.
Any tips will be appreciated.
Sorry for the long ass paragraph but I just had to add all the details just in case.
Thank you and i really appreciate yall for reading this

so my brother and i had an arguments regarding palastine and isntrael, how isntrael is committing genocide against them and how utterly disgusting they are cuz omg he's so Islamophobic it's insane I need to prove him wrong that the war between these states didn't start on 7 oct 2023. it's a long history. Please send credible sources if possible so that he can't refute me thank you