Is it okay to push people out of your life?

My sister in law & I dont get along. She has always disliked me and J never knew why. My husband never had a great relationship growing up with her either. She always thinks shes better than everyone and is so annoying. My husband and I just kinda avoided her for a while & onlycane around a few times a year, She blames me. She thinks im a terrible person who took him away from his family. My husband tried telling ger otherwise and defended me but she didn’t believe him and conversation just ended mad and angry. After that i dont think she will ever like me, not that she ever did to begin with, tried setting my husband up with others while we were dating, always saying i was too shy and nobody could talk to me and stuff.. its just very awkward around her. She still doesnt like me but tine has passed since & she still texts my husband on occasion to tell him things or ask for advice. I wish she didnt have to be apart of my life, i always feel judged or out of place and sad when im around her. I cant just avoid her without avoiding the rest of my husbands family at gatherings and stuff, we already come around way less than we should, but idk how se to get away from her. I dont like the feeling i get when im around her. My husband understands which is why we dont come around often but i feel just bad.