Why did my sister stop being my friend?

Anonymous
When I was entering high school, I cam out to my younger sister as a lesbian. She was my best friend, & this was a secret that I felt I could only trust her (& my closest friend from school) with. Months later, I came out to my parents. My dad did not like the news, but remained kind to me. My mom did not like the news & became downright abusive. She printed articles saying that being gay is shameful, acted out sex scenes asking “is this what you really want?”, screamed at me constantly, vowed to take away the $ set aside for my college, etc. On top of this she asked my sister, my best friend, to completely stop talking to me. What hurt the most was that my sister did this without hesitation. My mom became very close with my sister, and increasingly mean to me. Eventually I realized that I liked men too, & my mom paid for my college. Things got better, but when I came home from college during breaks my mom was awful again. Just a very abusive home to come home to. My sister told me that mom only was like this when I was home. My sister became mean to me too (snippy remarks, always critical). I notice that whenever I accomplish something my sister either tries to tare me down or emphasize to my mom how she’s better. When my sister accomplishes anything I feel that I cheer her on.

For my student teaching year, I was offered positions in my home town (meaning living from home), or hours away from home (meaning getting an apartment). I explained to my mom that I didn’t want to live from home so badly that I would pay for the apartment. I said that living at home is hard because we don’t get along, that she is the one who makes it hard because I always wanted my mom to love me. My mom said I had to live from home no exceptions. Now I’m finding out that my sister told my mom not to allow me to live at home because I said “mean things” to my mom about not wanting to live at home. Why does my sister hate me now?
Why did my sister stop being my friend?
4 Opinion