help me

one time while my partner and i were drunk ( like super wasted) we were having sex and then we stopped because i didn’t want to anymore and then i fell asleep and woke up to him inside of me i woke up and was like what the fuck and he was just saying his judgement was off. this happened over a year ago and idk how to feel about it. it hasn’t happened again after that but i’ve been thinking about it a lot and it makes me want to cry. i’m not in a unhealthy relationship or anything so i’m just really confused

Edit: i talked to him about it and he said he doesn’t remember anything about that night and that nothing like that will ever happen again. he started crying while saying that. He didn’t intentionally plan to do that. He’s not a bad person. Nothing like that has happened since then. we’ve been together for 3 years.