My fiancé has this ex whom he has two kids with, and no matter how horrible she is to him it’s like he can’t leave her alone.

He tells her first about things in his life where I get to find out later. He’s quick to jump and run for whatever she wants and needs. He claims he isn’t in love with her and he doesn’t want to be with her. Says he loves me and wants a future with me, but he won’t let her go…it’s an everyday battle. She always comes first no matter what. I’ve said how it bothers me and he just tells me I’m being insecure. So am I just being insecure?