It's my opinion that infidelity and BPD don't have anything to do with each other. My daughter is Borderline and she'd never even dream of being unfaithful to her husband.

How many affairs will your husband have to have before you've had enough of the pain he's inflicting on you? Infidelity is the one reason that makes divorce okay with a person of faith. God doesn't want you to live like this for the rest of your life.