Toxic sister

Ok I hate to be this person who comes on and complain ab my problems but I live with my sister I’m 15 she’s 16 she has borderline personality and it so difficult to spend practically every hour with her :( I look at sisters around everywhere and I just wish I could have what they have my sister is adopted so she also has always had attachment issues and I used to try so hard to get along with her to make it work but she is just a little shit always lying to me and my mom anytime she does something wrong she finds away to play innocent for my dad and brothers to save her the other day she called me dumb and I have a lot of learning disabilitys and bad social anxiety so it rly hurt my feelings then she played the innocent card and made me feel bad. It’s gotten to the point where I’m done trying to get close bc I’ll just get pushed away once again. It sounds so mean but I don’t like her but like and love are different. I don’t know what to do because I’m mentally exhausted and can’t put up with it anymore.