Boyfriends mom doesnt like me

Abby • Hi guys im abby and i just got this app. My bf told me i should get it because it tracks your period.
So I have a problem, my boyfriends mom doesn't like me. I don't understand why. I'm a very quiet nice person I don't yell or anything. She just doesn't like me. She always tells my bf that I'm just another hoe that doesn't give a shit about him, and he shouldn't spend that much time with me. What do I do?