be wary of going into computer science. it is probably the most over-saturated field that there is. the trick to not being miserable is to go into college with a clean slate. you will have about 3 semesters of bullshit pre-reqs and GPA fluffers like weight lifting and yoga before you have to actually make a decision. the university i went to allowed us to re-take "PE" type classes as much as we wanted. they wouldn't keep giving us credit, but they would boost your GPA. i took "Stretch and Relaxation" 4 times. lol all we did was show up, stretch for 15 minutes and take a nap.
whatever you do, don't force yourself to do something that you don't like. i went to college for almost 6 years, got into law school and dropped out after just over two months...to become a chef. i still don't see it as a waste, though, because if i'd skipped college and gone right into my current career, not only would i not have been able to advance as quickly, but i'd always be beating myself up emotionally for not being a doctor or lawyer or something. now i know, with 100% certainty, that "i tried and it sucked and fuck that."
the single most important thing is that you go to college, move into the dorms, and get really really really drunk, often. you will meet and be inspired by and beat up and fuck and help and cheat with and study with and fuck and drink with and go to jail with and party with and fuck so many different people.
pick up a bunch of different jobs as well so you can get a taste for what you enjoy and what you are good at. i firmly believe that every young person needs to spend at least a year of time bartending, so you can talk to people from all walks of life and see how and why they have ended up drinking alone and eating nothing but stuffed olives for lunch. you would be surprised at what you learn about life and happiness and real success.
one of the wisest teachers i've ever known, when speaking to me before i left for school told me this:
"think of college like a big compass that is loose and spinning around and around, but it is supposed to point at some great treasure. follow it, but let it spin. let it spin and spin until it runs out of momentum and you are certain where it is pointing. you may get dizzy. you may resent that you are stuck in one place. if you stop it too early, though, you may find yourself walking a very long way in the wrong direction."
you shouldn't be concerned about a career. fuck the guidance counselors, and fuck the nerds in Calc AB, whatever that stands for. you need to be concerned with playing video games, getting laid, throwing memorable keg parties and scoring a fat dank bag for christmas. everything else will work itself out.