<human>: Hello, all. I have a girlfriend that I've been dating for close to four months now and my mother hates her. She's 4 years older than me, I moved away from my parents and in with her and we left from Illinois to Denver together. So I get why my mom's upset but I'm an adult now. I'm supporting myself in every way and I'm out on my own.

I love and respect my mother dearly but I need to draw a line that she knows she can't cross. For example, whenever I call her or she calls me she'll sat nasty things about my girlfriend and she'll say them loudly enough to wear my gf can hear even though the phone isn't on speaker.

She constantly plays the guilt game with me and it's gotten old.

I want to be respectful, but I want to tell my mom to cut it out. It's negatively impacting my relationship and my household (apartmenthold?). And I need for this to end immediately.

Summarize the given text in a few sentences.
<bot>: My mom hates my GF and whenever I speak to her she's extremely rude and nasty. How to draw a boundary so she stops?