I completely agree with the answers above. If you want to play college football you'll have to start by visiting your top 5-10 schools to see if you like the campus, coaches, city, etc. Remember that while football may be very important to you, your education should be equally as important.
I highly recommend looking into University of Oregon, not just because I went there and had the greatest experience, but because the campus is beautiful, the people are great, and of course - the football team is (without a doubt) the most innovative, dynamic, and competitive of them all. The Ducks have been consistently ranked in the top 5 the past several years, and they are consistently in the top 25 as far as recruiting the best talent out of high school.
Let me know if you have any follow up questions (and GO DUCKS!) :)