Girlfriend mom problems?

hmmmm where to start. my mom doesn't like my girlfriend because she wants to have a relationship with her and be "buddy buddy" but its effecting us. She (step mom) goes out of her way to find crap out about my girlfriend on purpose to like try to find things out to have dirt on her i guess? anyway, lately i was kicked out of my house and my girlfriends family helped me out and gave me a place to stay and took care of me. My step mom is infurious with them and feels like disrespected and backstabbbed when they took care of me. she was the one who kicked me out. My girlfriend plays soccer for her high school and has a 3.67 and is a pretty good kid :) i love her so much. but my step mom is a controll freak and takes her anger out on me. its not the mature way to handle it and im not sure either because i love my girlfriend so much :) shes been there for me through everything :) any advice. moms please explain :/