Am I depressed?

I cry every night there is not a night I don't cry. When im at school im happy I talk a lot I smile and have fun. Once im home I don't talk to anybody im always in my room I feel trapped because my aunt ignores me and doesn't let me do any thing. I feel as if she hates. She tell everyone that she treats her kids and me the same. But it is a lie .I am way different in school than at home is that bad. Theres is times that think she will be happy if im gone.