I agree with jenkins09, ruby.

It doesn't sound like your ex has changed, nor will he.

You should let your mom be the mediator for you. When your ex comes to you with his sob stories, tell him that you are not interested and that you need your space from him. Tell him to contact your mom about the proceedings. Period.

Do reach out for Therapeutic assistance in working through your fears, co-dependency, and becoming an emotionally stronger person. It's very common for people to fall into cycles, even though they hate that kind of man. They frequently find themselves in another abusive relationship. You certainly don't want that to happen!

Gentle hugs and very best wishes sent your way....