I have been in an off and on relationship for about 3 years now. I really need to move on since he is unwilling to change his lifestyle and I do not want to live this way. I've told him how I feel so many times (beat a dead horse). He says he understands and if the shoe were on the other foot, he would be upset too.

I guess, why should he change if I keep coming back? I cannot seem to end it for good. What do I do?