My Parents Make Me Feel Suicidal ?

I just want to go to college, but I don't think that I will make it due to my family. Whenever I'm around them I feel anxious and depressed. Everything, and I mean LITERALLY everything that they say to me is something negative. It makes me go into my room and hide under my covers in complete darkness for hours, upon hours. At times it has been well over 16hrs that I will cry in darkness, alone. My mother yells constantly everyday to the point where I dont even want to wake up in the morning. My father is the ultimate demise of me. He makes me feel worthless with every insult he tells me. I can't even hold my head up to look at people anymore because I feel ashamed of myself. Every night I just cry in my room alone thinking of ways that I can end the pain. I'm pretty much tired of existing, and over life in general. What should I do?