Yeah. I feel the same way. I loved my ex alcoholic, drug addict, sex addict, verbally abusive fiancé. I wanted to believe she would get better, but she only hurt me more. I believed her every time she said sorry and wouldn't do it again. I heard so many promises.
One truth I've been taught is: If an addict's lips are moving, they are lying.
I had to realize that before I decided to just cut all communication. If she really wants to get better, she can mail a letter or contact my parents to let them know she genuinely wants to change her life. She has my mailing address.