My mom hates my boyfriend

She is so negative about my boyfriend. She says things like he doesnt come to the house or why doesnt he see you often. Its just that he lives somewhat far away from me and its hard for him to really see me with my schedule with work and everything. My mom hates that we go out and not stay in. I dont know how i could stop her from telling me such negative things honestly it stresses me and makes me feel bad. She doesnt know the relationship and how i really feel. She likes to make assumptions and doesnt let me go. I dont know what else to do. I have confronted her so many times and still doesn’t change. I talk to my boyfriend about it and he got mad and now dislikes my mom. She’s too into the relationship and i have told her to back off but she doesnt stop and let me breathe.