Help I don’t know if I made the right choice!

Hey guys 

this isn’t technically autism related but I’m scared and confused. 

I have just tried ending things with my 3 year long partner. I’ve been getting help with my mental health and I’ve been advised that my relationship wasn’t healthy. It went on for a while and it began to sink in that it wasn’t. So I tried breaking things off last night. We live together so it was very difficult. I kept the blame on me. I’m now terrified. I feel like someone is resting a kettleball on my chest. He doesn’t want me to move back out but it’s his dads house and he’s meant to have his kids tomorrow. I said I don’t think it’s fair that I stay. I told him I was asexual and I don’t like sex he said we could still have a relationship with out it but I don’t think we can. He said he can’t believe he’s losing me. But he also can’t seem to understand that I don’t think things are working. He asked if we could just take a break and I go home or am i actually ending it? I said I wasn’t sure what I wanted but I don’t think I’m ready for a relationship right now. I don’t know if I want to ever be in one. I want to be friends with him 3 years is a long time. But he seems to want to pretend nothing has happened and that it’ll go back to normal. I don’t know if I’m making the right choice here please any advice?