I am 47(female) and my partner is 54 (male). He runs back to his ex every time we break up! She is madly in love with him. He keeps returning to me about a week later. She is very jealous of me and she only gets to see him if we break up. She is obsessed with him. So why does he keep coming back to me? Our relationship has been off and on for 18 months and his relationship with his ex was 4 volatile years. Thanks