Help me change please?

Depression can exaggerate things and makes things seem even worse. Such as when you said "I'm a slut" and "Everybody hates me and I don't know why" if your parents won't help you, you need to help yourself. There are many phones numbers and websites that you can keep anonymous but will still be able to talk about your feelings try http://www.covenanthouse.org/nineline/index.html and I wish you the best. :]