just because your life is boring doesn't mean you should do bad things just for a change of pace. you might not know it now, but smoking and drinking is terrible for you, physically, socially and mentally. my friend (he was my boyfriend before this, one of my really good friends) went to Germany, where the drinking age is around 14, he was there for over a month, he was so different when he came back. we haven't been friends sense. the alcohol changed him, beer cans followed him when he got out of the car, he got new stoner friends (i hope mentioning stoner's isn't bad for the forums) and probably did drugs for a while too. he just changed, he wasn't fun to hang out with anymore. he seemed so much different.
i know that your thinking that 'that's one kid' hundreds of kids deal with this every day, they change, and if you ask them when they grow up (if they even get that far) they will say how much they regret doing that, doing drugs and alcohol and the like.
for something appealing try starting a new sport, a new club, a new group of friends? anything that is constructive. and talk to your parents, they may seem terrible now, but they gave birth to you, they have raised you for 16 years. driving you to where you needed to go, giving you a place to stay. being the people who congratulated you on a good grade or a new (not crazy) girl friend. also they probably were the people that were there for you when everything else around you was changing. they have always been your parents and they always will.
for not finding anything worth living for, well we can just talk at you all day till we all get carpal tunnel, but if you want to change your life the best idea is to talk to a shrink or your parents. it's your life, but anyone you talk to that knows at least a bit about you, will tell you not to waste all the work you put into your life by suicide, or by ruining your life with drugs and alcohol. especially your parents, they will probably stand by you through doctor's visits, or shrink visits. they are your parents and they always be. (now for my favorite quote in my life) friends come and go, but family is forever.