What if you decided to go to college? A lot can change in the time between now and 18. Finding a job will suck, but you are still likely to find one and you can save up and have the blessing of knowing you did this by yourself, with no help from family.
I do have moments of wishing I was a teenager again, but for the most part, I'm content with adulthood. Yeah, it's a lot different from being a teenager, you have plenty more things to worry about when you're an adult, but the pros outweigh the cons. In my case anyway.