Help me please

My name is Gunnar, and I feel like lately, I have been dealing with depression, I am 11 and my parents don't seem to care, at school I am always bullied, and when I feel sad about something, my mom says I am "overreacting" or "being a baby". I have come very close to cutting and I feel there is no need for me on this planet, but I don't wanna leave. Help me.