I'm only 16, people never cared now. Why would they care when I'm gone?

I've been through so much in my 16 years on this planet, I've seen more death than love, more hate then then care, and more lies than truth. One lie I hold onto is that there's people who care about me. There's not. My mom used to yell at me and say I'm a disappointment, my dad's a no good alcoholic, my aunt verbally abuses me, my whole family thinks I'm a mistake. Even my "friends" pick on me and fat Shane me when I try my best to be healthy. I just want to go to sleep and never wake up, the therapy won't help. And I'm ready to just be gone.