Don’t know what else to do…

Everyday just gets worse. I feel like I have nobody to talk to. Not only do the people at school criticize me, even my parents continue to do so all the time. My mom, I’ve always known she has a passionate hate towards me. I can see it in her eyes when she talks affectionately towards my elder brother and gives me a wicked glance.
I try so hard to get her to like me. But all of my past academic accomplishments aren’t enough for her. Whether it’s my brother, a cousin or a random stranger, my mom HAS to compare me and point out my flaws. She says that I am fat/unfit and when we go shopping she always buys me clothing three times my size. From age 12 (I am now 16), I have been bothered by my image, my weight and feel everything I do just makes me more of a humiliation. I have always felt like a joke, an unnecessary object in the way of everything.
I started to feel alright for awhile knowing at least my parents cared for me.
But it completely changed when I came to 11th grade. My mom kept lashing out on me as my grades fell down. I keep trying everyday to improve them but she doesn’t care for my efforts and always looks at the final result only to tell me I’ll be a failure in the future. My dad, who I thought was my hero, did absolutely nothing after I shared my feeling of being abandoned and ignored by my mother. He said that I have to try to make her happy. When I rebel against her idiotic opinions and words, it’s always going to be me to blame. Nobody understands, they don’t know what I am going through. I appear smiling and out-going at school. I just can’t take it anymore. I just feel like going somewhere, far away… And never coming back. I’ve been having suicidal thoughts since age 14, but never got the nerve to actually do it always thinking it’s going to get better. My conclusion : It never will.