Struggle with guilt

I have been struggling to accept that my partners mom doesn't like me. She doesn't know me very well and has only heard negative things about me because of some drama I had gotten into with my partners stepsibling.

Because of this drama she has been very passive aggressive toward me and has made it difficult for me to feel comfortable around her. Despite my attempts to smooth things over with both parties, i've come to the conclusion that my partners step sister and mom will probably never like me. I understand that this doesnt inherently mean anything bad about me and my partners relationship, but I still cant seem to escape the guilt of knowing two very important people in my partners life do not accept or like me