Ok, I'm depressed, and there isn't anything I can do. What do I do?

My only shot at a decent girl was just ruined. I've been depressed for 7 years now. I'm twelve. I have no friends to support me, and I feel like I'm invisible. I've never had a girlfriend and I just got rejected by the only girl I like in my school. I watched my sister attempt suicide, my family doesn't care about me, and my grandfather just died. I've had lots of smaller problems that fueled my depression and no one wants to help. I tried a few therapists and they didn't help. I don't want antidepressants or anything my doctor would give me. Help?