My parents are trying to ruin my girlfriend

I (18m) and my gf (18f) have been together for over a year now, and my mom absolutely hates her. She claims that my gf actively makes me have an attitude, tries to control me, and “pulls me away from my family and friends”. She also likes to try and claim we’re toxic for each other based on the way we communicate and treat one another. I want to marry this girl, and we both hold a very traditional idea of respect. We tell each other where we’re going, what we’re planning on doing, and who we’re going with, and we update each other. It’s not about distrust or accusation, it’s about making the other feel included and informed. We trust each other completely, and we do all of this for the sake of each other’s comfort and out of respect for them. My mother has been actively trying to make things as hard as possible to see her; she’s banned me from using my car to go out with her, she’s banned her from the household, and had multiple lectures at me about being with her and “my behavior” all for months. Now, she’s actively trying to go to my gf’s parents to cause problems and try to cause disruptions at her household. Her Dad isn’t the safest person, and something like my mom butting in could put her into actual danger. I don’t know what to do, because my mother has this irrational idea that we “aren’t being mature and reaching out to repair things” while making it as hard as possible to see her. She refuses to make my gf feel safe enough to try and repair things, and now is going to push her household into an unsafe situation. Originally my mom didn’t have a problem with her over a year ago, but as we grew closer and became more reliant on each other, more of these things I’ve talked about became apparent. We naturally became each other’s best friend along with lover, and I don’t know why my mom has had a deepening problem with it. I’m growing out of the household not because I’m being dragged away by my gf, but because I’m 18 and about to start life at college, and my gf is the one person moving forward in that stage of my life with me.

I don’t know what to do, I plan to propose in a year, and I don’t want her family to start losing love for her over my moms bullshit, I love her family so much