When I met my lover, he was married but he no longer sleeps with his wife.
Although, when I met him I was not really looking for something serious. But he was very open and matured, so I just continued being with him and I did not mind that he was married.
Four years into the relationship, I am so jealous of the time and intimacy he shares with his wife my friends say I'm a doormat and I should start fighting and getting aggressive.
I am afraid to do that because I am tired of losing him.
What do I do?