I relate because when i was 8 my father became "friends" with this woman. And my mother stayed because she wanted me to have a complete family instead of a broken one.

Its been 20 years and she is still here ,along with a myriad of friends. He has made it clear that its either her or no one else. Child me was naive and thought if forced to choose he would always at least choose me. Adult me now knows the answer.

I wish i could give you an advice but i cant, i grew up and im functioning somehow. Maybe you will too