I do the same thing, but to distract myself, Iv been trying to stop. I agree with the other person. It might lead to self harm... it's really not heathy and is a form of self harm really. Please try to stop. Find something else to distract yourself.
Im really sorry but you can't really do anything about your parents... I'm bi but only hint it to my mom. She doesn't 'believe in bisexuals' just stay strong and try to just block it out. Don't talk to them about it. There's really nothing else that you can do. I'm here to talk if you need to
Okay first of all that's a VERY toxic relationship and you need to remove yourself from it immediately. She is manipulating you into stay friends. You do not need someone like that in your life. She will drain you. I had a online friend that was horrible to me but she was very depressed and I was always having to save her. And it was just draining me, and guess what. I left her ass and 3 years later she's saying the same shit to other people yet she's still alive. Point is, you need to put yourself first sometimes. This is that time