I would really appreciate some advice ❤️

Last night my boyfriend woke me up, he had been out all night. He was drunk. He told me this girl made him feel more awful than he has ever felt. He told me over and over he only wants me. He told me that he isn't ready to talk about it after I asked what happened. He cried until he fell asleep on me. My mind is going all over the place. I know it's selfish to want to know what happened for my sake. I just want to know how far it went and how it happened. I don't know how to ease my mind. I have respected his wish by not asking him what happened but I feel the need to ask how far it went. Please let me know what you would do in my situation. I have no idea what happened to him.