Hmmmm why is it so hard?

I've lived with my mother ever since her and my father got divorced. Which was 11 years ago. She basically brain washed me, and told me, my father was a bad man. And basically made me hate him. He did go to prison and got out last year. Last year I seen him 3 times the whole year. But this year i've seen him 8-9 times. Out of all them times I've spent the night with him once. She has made me spend the night with his mom, and dad, and and my uncle Micah. Don't get me wrong I love them all. But its getting really old to me. How to I get my mother to let me spend more time with my dad and less time with her?