Should I go to the hospital for depression?

Yes. You should go to the hospital. Tell your mom you want to go to the emergency room because you are suicidal. Don't be ashamed. victims always blame themselves when its bullshit. You need to get mad at the people who suck (users and guy on the bus) and not internalize it. Its not you, it's them. You know that at 16 purberty messes up the brain like drugs, right? Its hard to be 16! Stop punishing and blaming yourself and get help immediately.