Ryan ... I am so sorry you are having to go through this ... You have a right to be treated with dignity and respect by your parents and siblings and to not be subjected to harassment, bullying and abuse by them for any reason - up to and including your sexuality.
If there is not a trusted adult in the household that you can talk to, then try to make contact with a trusted adult outside the family - such as a teacher and/or counselor at school, or a trusted parent of a friend ... Perhaps they can put you in touch with some local support networks that can help you come up with ways to handle it until you are old enough to leave.
Also, regarding posts here that aren't supportive ... You can report them by clicking on the red, white & black triangle in the lower left corner of the post and the moderators will remove it/them and warn the poster(s) to back off ... You don't have to put up with feeling bullied, harassed and abused here at PC either.
I wish you the best young man!
Sincerely,
Pfrog!