TIFU by getting too drunk with my (ex?)best friend

The other night i(19m) was hanging out with my best friend (18m) and it was going great. The next morning he had something om so he had to leave early so he stopped drinking, and because i had nothing on till the next night i decided to keep drinking, which we both agreed was chill. We shared the bed because its a double and we were close friends, and he slept shirtless(this is for context). I have quite a high alcohol tolerance so there is only three times I recall drinking so much i blacked out, one of those times was that night.

I awoke the next day and called my friend to see how he got on and he told me that apparently last night i had spread moisturizer on his back the previous night, i had no clue that i had done this, i was trying to think back to as to why and i had no clue in the slightest. I tried to think of why i would do that sober and the only three that i could think are that i was moisturizing and decided he looked dry, thought he looked dry without me already moisturizing or his acne looked bad. I was embarrassed to all hell and felt so so so bad about it, and he obviously was hella uncomfortable by it, i apologized and we hung up. I called him a few minutes later to apologise again and then end the conversation on a nicer topic.

Its a few days later and i tried to act like it didn't happen, but ive been so embarrassed and felt so horrible. So i had tried to message the same amount as normal. I woke up today to see ive been blocked/unfriended on all social media and i believe my number has been too. And a few mutuals have also unfriended.

I hate myself why did i do that, i have no clue what was going through my drunk head. All i know is it wasn't malicious or anything, it was probably me trying to be a good friend really badly, ive lost my best friend of 10 yrs

TL;DR: got drunk moisturized my bestfriend while blackout drunk and now i think everyone hates me