shrug, notfred is the typical high school/college student know-it-all whom we all were at one time.
While I don't wish for it to happen to you, there is definitely a chance it will no matter how much you "plan" things. I "planned" things too, but sh*t happens, and people change through no fault of your own. I'm not saying I've made the correct decision all the time, but it is very possible to do so and still end up like me. I've seen it happen.
Anyways, best of luck on your perfect life. I once said exactly the same things (only on BBS' not this new-fangled thing called the internet...
Peace,
-Phil