Dude, you should not be using weed to get rid of depression. First you just need to chill out. realize that you should not be depressed and that if you want to have a shot at this chick, you need to get yourself out of this current state. You should give up weed and booze for a week and everyday go do some serious exercise like run a mile or 2 and then do some situps to get those abs this chick likes. Then when you wanna make your move and start talking to the chick I would reccomend you drink some beers, get your gameface on, and just talk to her. You might find out you don't even like her that much. It may seem like she is all of it but that is just your age. Trust me, I used to be 16 and in highschool and I know what that shit is like. It gets better but if you dont want it to be so shitty then just start talking to people and make really good friends. And if you really suck and being social then just get drunk and go get social.