It really all depends on the person. Weed helps me cope with depression in alot of ways, but moreso then weed, my anti-depressants help me cope. They aren't a life-sentence and as a teen they're fairly easy to get prescribed to you. Also, depending on the anti-depressant, it may help you deal with your anxiety as well. Im no doctor, but the combo of depakote ((mood stabilizer)) and seroquel ((anti-paranoia.. serves many purposes)) has proven to be a great combo for me. But if you wanna keep it natural, smoke weed. Just be careful, it'll cut a hole in your pocket. Quitting smoking weed may temporarily be a bitch, but after 2 weeks you'll probably not really care. Anxiety and depression with teens is like cheese with crackers. As in, a really common combo. Some people can cope with no help, some people need help to cope with those feeling. I am one of those people who needed help. -shrugs- Decide for yourself what kind of person you are.

Hope this helped a wee bit.