Talk about sexual abuse

It’s taken me a lot to write this but I’m very stuck. My boyfriend about a month ago had a massive psychotic breakdown and ended up in hospital for 8 days. He ran away from his home 3 miles, bear foot and in his pjs to my house. That same day he was sent home from school because he was extremely paranoid. A close friend of his and I went round to his house after school to see if he was ok. When we got there he was saying all sorts of stuff that didn’t really make sense. However one thing he said has always been stuck in my mind. He said that he’d been raped when he was younger but after briefly talking about it he changed the subject again. His friend and I discussed what we were going to do as he told us not to tell anyone and we had no idea whether what he was saying was true or not as like I said he was saying all sorts of random stuff. That same night was when he ran to my house and ended up in hospital. I haven’t spoken to him about what he said as we don’t really talk about what had happened because I know it makes him upset. He’s been acting very stranger again recently and not really talking to people especially on social media. I originally thought I’d done something to piss him off so I asked him and he told me he needed to get something off his chest. He said he hasn’t told anyone be he thinks he might be gay. Obviously I was very shocked and very confused because only a few days before we slept with each other and were very very close and the day before he was telling me how much he loved me. I did some re search because I wanted an answer. I read that the reason why someone may be feeling that all of a sudden was because of childhood sexual abuse and that they’re not actually gay but confused about everything. I obviously told him there’s nothing wrong with feeling that way and I’ll support him through whatever he decides. When I read that I remembered what he had told me the day he ran away. I also spoke to a close friend who is gay and he told me that he’s probably confused or it’s a ‘phase’ . They are yet to find out what is actually wrong with my boyfriend and why he ran away so I was thinking could that maybe be why he’s so confused and he freely admitted that he was confused to me and he’s not sure and he still tells me he loves me. Reading that about the sexual abuse thing made me think should I talk to him about it or not? If so can anyone give me advice because I’m so so confused and stressed about everything