I think he’s cheating. And apparently is with a minor and has a child with another minor. Idk who to believe. Should I officially be done

Ok back story. We were together for 2 years and his family has a history of schizophrenia and he had a mental break down. While he was getting treatment I guess some woman there told him we betrayed him and he should come live on a farm with her which he agreed. He told his family that he didn’t want to be with me anymore or come back. So I left and got my own place as his mom literally wouldn’t let me live there angmore. A week later he was released and blowing up my phone saying he didn’t mean what he said and wasn’t in a good mind set. The past month was traumatic so I told him, I just need some time to get situated into my new place but I would like to maybe still be with him. He kept texting me everyday. Finally he came over to hang out and he told me how his ex tried texting his brother but he has his brothers old phone now so they’ve been talking but she has a bf. ok that’s fine. We start hanging out more and hooking up then suddenly he would sleep over but we weren’t hooking up and he wouldn’t want to kiss me. Fast forward a week

My bf just got his car about a month and a half ago and while we’re driving the light hits the window and I see on the passenger side there’s a stick figure drawing of a female. I said who drew that. He said he did when he was waiting for an appointment one day. He either would’ve had to sit in the passenger seat cause it’s too far away. Next week comes around and he comes over and he gets a text from someone in his phone called L. I told him his phone buzzed and he was like oh L is someone from work but my gut literally started firing up. Anyways I looked up number and it was the ex he was talking to. I asked him about it and he did say it was his ex. I asked why he lied and he said he didn’t want me to be mad. So I asked him to leave. Then 3 of his exes who I haven’t met were messaging me on Insta calling me a bitch and some telling me how his brother confirmed he’s back with his ex and he’s been lying to me.

I’ve spent a lot of time not sure who to believe but part of me does believe his exes. I’m just hurt. Because one ex told me the ex he got back with is 16 and we’re both 22 and he dated her when she was 13. Another ex also told me he didn’t appear for court regarding their child and she was well is 16 and got pregnant when she was 13. Idk it’s just all too much. Please help me get clarity