My Sister Doesn't Talk to Me Anymore

My oldest sister doesn’t talk to me. She thinks I’m mostly out to make every bodies life miserable. She thinks everybody goes through mental disorder(s). That some of us just use it as an excuse. And don’t want to learn how to control it. We use to be close but then when I turned 18. She started to stop coming over, stopped calling me, stopped basically talking to me. I’m 42 now and I think all this time she use to talk to me was only from her thinking my mom was the problem but In reality I have bpd. My sister is 49. I love her so much but she doesn’t feel the same about me. She’s even made fun of me to my other sister. By saying I’m off and I’m coo coo and crazy.