7 year relationship over?

My fiancé and I have been having on and off fights for the past couple of years. I feel like our relationship has gotten to a place where we both are defensive most of the time and lots of little things get to us. He told me that he thinks we'd be better off if we broke up, I agreed with him but the next day panicked thinking it's a huge mistake. He my best friend and I still love him I don't know what to do I want us both to he happy and neither of us are right now and I'm not sure how to get out of our cyclic fighting. We've gone to a counselor in the past but it seemed to not help at all, what should I do? I don't know how I'll manage if we break up and he starts dating other people after us being together of or 7 years