My ex gf accused me of having "commitment issues" as well because she could not admit that the problem might be her. It just had to be me. Meanwhile, it was a herculean task to deal with her temper tantrums, controlling nature and emotional immaturity. At times I'd just give up and try to leave. But she would prey on my caring, loyal nature and guilt me into staying by telling me I was quitting on us. She said she wanted to "work on things" but it was always blamed on me. She never did any work on herself. And around we went. I think your main focus should be on the real reasons why you two keep breaking up and why you think he has commitment issues. Not to be blunt, but sounds like he is scared of being alone but also not happy in the relationship. Just a man's perspective.