WIBTA for not making my sister a bridesmaid?

I am a 27F and I have a sister (31F) who has always been difficult to get along with. She takes it too far with pranks and is just generally a very irritating person. I avoid her as much as I can. <br><br>I am going to be married in the spring and my fiancé and I are finally looking at venues. I asked a few friends and one of my other sisters if they would act as a bridesmaid for me (I don’t plan to have a very big wedding). My other sister asked me if I am going to ask my sister as well and I told her I was not going to. My sister said that it is a big deal, and that I have to ask her because we are family. I said no, and that even though she is family she has made my life a living hell for years and that I’m not going to make someone I don’t care for a part of my wedding. <br><br>My sister told our parents and now they are getting in my ear about it. I am getting pretty sick and tired of everyone telling me that I am an asshole because I don’t want to have anything to do with my sister.