Here's my last bit, so bear with me. The decisions you make now, can't be changed but with years and years of hard work to redo it. And in those years you become something different. Everybody does as time passes. You get married, you get into debt. But you're never gonna be the same person you are right now. And promise and potential... It's very fickle. And it just might not be there any more. 

　　All I'm saying is that you're an adult now. And the tough thing about adulthood is that it starts before you even know it starts, when you're already a dozen decisions into it. But what you need to know, no lifeguard's watching any more. You're on your own. You're your own man, and the decisions you make now are yours and yours alone from here until the end.