Help? What can I do about this fear?!?

For a long time in my life I have been abused and bullied, both by my parents and people in school. I also had precocious puberty which caused accelerated bone age, so that I stopped growing before I was supposed to and now I've been only 5'1 and about 85 llbs for the entirety of highschool and was always picked on by boys calling me ugly, even though I was shy and minded my own business. Even guys at the mall and in random places call me ugly, or just "that chick has NO sex appeal" which is what some dude said somewhat recently. Um...wow, thanks for your two cents there, buddy. And he wasn't even good looking himself lol, but he was huge, so maybe he just hated my size? idk, whatever. But this, outside of how my family treats me, is what i have to deal with n a regular basis. I've never had any siblings and my parents always gang up on me to bully and sometimes flat out abuse me. As a kid I was obsessed with the idea of protection, and hat was one of the sole reasons i wanted a boyfriend, but of course that didn't happen, and the few guys i did date were all EXTREMELY rude to me about my size and would try to flat out bully me about the way i looked until i dumped them. And now its like I'm afraid of everything, so paralyzed by fear that I can't live my life, i feel like its not even worth it anymore, what can i do??!!