You always hear about a mid-life crisis, your just going through your teenage crisis years.
You need to relax, take a step back, buy a notebook, and write down the things you want to accomplish.
Get the drums, and practice for a few months, then put up an add on craigslist and find some band mates.
Play some gigs, get some chicks, STAY IN SCHOOL, stay away from negative 'friends', and druggies and you'll be fine.