As someone else on this site said once, getting into college in the first place is actually more influential on the rest of your life than graduating. You can always go back.

Then again, college is to a certain extent what you make of it. You have opportunities there that you're unlikely to get again. Another option you should consider is changing majors. Astronomy or Egyptology or something that's just interesting with little or no direct practical application. After all, you've already got the skills you need to earn a living.