My is terrible and helpless?

I have no goals, no special talents, I've failed math and about tO fail French. I've lost interest in the things I used to love. The only thing I think about these days is the past. I never look at what's happening because it either sucks or more depressing. I don't have the same interests as everyone. My friends are stupid and annoying. I basically have nothing going for me. I worry about my grandparents and how much time they have left. I show no emotions exccept sadness and anger. I get angry at stupid things and thrash out in anger. I have no purpose in life but to join the army, but to probably get killed in an instant. HelP