Boy, if I had a rolled up newspaper I would smack you with it!
I also will agree with the "you're 17, things change as you get older" notion. I felt the same way when I was 17. I just wanted to play around and I did. Now that I'm older my priorities have changed and I've been happily married to my wonderful wife for 3.5 years. You're young. Play around and do what makes you happy. Marriage isn't for everyone, but don't discredit the idea just yet. Plus, you don't have to be married to be in a loving, committed relationship. "Marriage" is just a word on paper, really. I love my wife the same regardless of what a piece of paper says, how the government taxes us or if we have a metal hoop on our fingers.