no need to apologize--i appreciate a teen with some depth!! lol
okay, here's what i do when i'm having trouble making a decision and there's a tight deadline: i use a plain old 'pros' v. 'cons' list. make the list using your own hands and pen/paper (not on the computer). for some reason, writing things down with my hands helps me connect with the process much better. i'm such a fan of this that even my son does this when he needs help making decisions...
and yes--we all want happiness. the fact that you understand that you're responsible for your own happiness puts you ahead of the game, frankly.
good luck with whatever you decide to do!!