I just learned a new term: trauma bond. This is when you bond with your abuser either out of pity for him/her or because this is how you are coping with the stress. This has to be the number one reason love addicts get addicted to those who abuse them.
I must confess this happened to me. My husband beat me in the 70's and I felt sorry for him. Most people would feel sorry for themselves.
Fifty years later the same thing happened with our son. He started abusing me physically and verbally and I felt sorry for him so I did not call the police. It took me almost three years to get out of the situation thanks to the new group Codependent Parents Anonymous. codaforparents.org