I Am So Sick of Everything

I am getting so sick of other people. I'm sick of being mistreated, I'm tired of fighting, I'm tired of trying to salvage relationships. I don't know what it is that I'm doing wrong. I'm a nice person. I'm a smart person, a great person even. I'm always treated like shit. I want it to end. I just know that if I break all ties with everyone, I'll be alone. It's the choices I have are being treated like shit or being alone. I'm sick of it. I'm sick of those being my only options. I'm tired of dating someone that doesn't treat my well. I'm tired of being friends with people that aren't there for me. I'm sick of not having a good job, I'm tired of not having any friends, I'm tired of my shitty relationship. I'm tired of my boyfriends family. I'm sick of my own family. I just want to escape it all and escape my thoughts.
I'm tired of this personality I have. I'm tired of my low self-esteem. I'm just sick of it all!!!
I don't know what to do. How do I change my life? How do I get better people in my life? I just don't know how too. It's all piling up. I feel like I'm drowning in my own problems.
I have no support. I've been supporting myself for too long. I don't know what to do. How do I change my life? How to I achieve these long goals? How do I let go?!
I NEED answers!