For me, music helped more than anyone/thing. I've never taken drugs for it, even at one point when I was basically a zombie; I didn't even walk the same, I was struggling so much.
I say make sure you're working towards something that you want, whether it's professional, personal or hobby/recreation. I was in the worst place at 19 but by 21 I was turning things around. Best thing I can tell you is not to worry about things you can't control and let tomorrow-you worry about tomorrow and today-you deal with what you can deal with today. Even if you're not living a great existence for a while and scraping by, when your time comes you'll still be here to enjoy it. Good luck though