The uni degree is not required, I myself did not finish my degree and know people who did finish one and have failed the selection process... if you manage to go through stage 1 without the degree I reckon you'll be ok going to the selection and giving it your best, however, it all hangs from the selection and if you show even a hint of weakness on the CTC phases you'll be purged.. so make up a good excuse as to why you left your college.
I am currently doing my ATPL exams which you will do if you pass the selection and depending on your field of university studies could help you a lot with them, I studied computer science in a very good university which gave me a strong physics and calculus foundation with which absolutely none of the math involved on the ATPLs have been a challenge.
Also, you're young still and getting that degree can give you a fallback in case you don't get a job at the end.
Just my 2 cents.
-Polorutz