I left college after a year because I had chosen Engineering and it was BORING! I only really went to do something constructive while I was waiting for the Aer Lingus Cadetship to come up again. I had applied once but not been succesful. I wanted to go flying, and when Aer Lingus stopped their cadet program I decided enough was enough. I'm now doing My ATPL in the states.
I agree with the posts but would like to add some points if I may.
I really don't know if a college degree will help you get a job, I doubt it. From there are times when I wished I had stayed and finished my degree, and theres a few reasons for that. Firstly it gives you a great security cushion. There is a chance although no one likes to consider it that you might never get a job flying. I am on a course with several people and you'll have to take my word for it because you can't meet them, are not the right material for pilots. In my opinion they are wasting there time. If you want me to go into details I will, but its off topic. Secondly, consider the possibility god forbid that you lost your medical? Its happend to people before. Or furloughed. I also have the opportunity to stay in the states and instruct, however I cannot get a work Visa because the only one I'm eligable for requires a college degree. A college education almost seems to guarantee a visa in a lot of countries, OZ, USA etc. The possibilities go on and on.
Your young enough to still do it, 21 or 25 an airline is not going to think your to old or too young. I think there are so many benefits of having that degree in your back pocket, and if I could turn back the hands of time I would certainly have stayed on and finished the degree. Good luck with whatever path you take.
(P.S sorry for the spelling and grammer, Tired to many exams)