If you are still eligible for a Direct Loan, you will need to complete the FAFSA. That’s how you get that loan. Direct Loans are the only subsidized loans. And there is a limit to the amount subsidized. Your whole Direct Loan won’t be subsidized.
Also, you are at a four year university now. When you complete that FAFSA, if you have a very low income or a $0 EFC, you could face verification. The college will rightfully want to know how you are paying your living expenses with no income.