Relationship

So my bf and I have been together for 9 months and he’s a great guy and I love him but he struggles with anxiety and ADD. This gets really annoying because when I talk to him he doesn’t really listen and I have to repeat myself which then leads to fights( because I’m annoyed he’s not listening). He also doesn’t have friends, which means he clings to me a lot. When he was 15 his dad passed away and he only had one friend that helped him through that who happened to be a girl. He and the girl don’t even talk anymore ( she did some shady things to him) but He always talks about her and wants to rekindle their friendship because she was their for him when he lost his dad. I personally don’t like when he talks about becoming friends with her again and I think he should just forget about her I mean he has me now for crying out loud. Idk who’s right in this case but this is frustrating.