It seems loads of us are having, or have had, similar problems! I'm in my third year at uni at the moment, and spent some time with the university air squadron, but didn't like the RAF lifestyle (at least the experience helped me to find this out sooner rather than later) I'm currently applying for an airline sponsorship, which if I get, I'd be able to start after I graduate.
I chose to go to uni because it's an extra qualification (which will look good to an airline), it's only 3 years long, and I'd get serious living experience out of it. I'm happy I made the decision to go to uni first. I feel more mature (I think!)
Good luck with what you decide to do. It must at least be comforting to know that so many others face a similar dilemma!