I don’t know if it was my fault

I had been messaging this guy (we’ll call him R) on tinder and I had talked to him at a party before. One night I go out to a bar and I get pretty drunk when I get a text from R asking what I’m doing. I tell him I’m at a bar with friends and he asks to come so I say sure. He comes, we talk, I drank a bit more, I think he had one drink, then we were in an Uber to his house. I was pretty out of it, I don’t remember getting into the Uber or going to his room. I remember just laying on his bed staring at the wall when he initiated things. I think at that point I may have blacked out or just shut out the memories because I barely remember what happened. I didn’t remember taking my clothes off. I remember just laying on my back, not engaging in what was happening at all, and staring at the same spot on the wall. I woke up the next day naked in his bed, I had thought that I dreamt the whole thing because it felt really foggy. Was it my fault? On one hand I got into the Uber and in his house out of my own volition but I’m the other I was pretty drunk and he was at most slightly tipsy, though I think he was sober.