Infidelity Support Group
Any relationship in which one partner engages willfully in sexual relations with another outside of the partnership is considered to have experienced infidelity. This breach of trust is often traumatizing for the faithful partner as well as the relationship, and support is often needed to heal emotionally and to decide whether or not the relationship should continue after...
Serial cheaters are narcissists. You have been taken advantage of and used because you serve a purpose.
You deserve real love. Do whatever you can to disengage and get support from friends. Online, councelor, etc.
I'm in a similar situation. He stole most of my adult life.
Check out ChumpLady.com.