Texas State tuition and fees is ~$10,600k. The federal student loan for seniors is $7500, so you need $3100 to cover tuition for the year, but only ~$1500 will be due in Aug/Sept. The other half will be due in January. Housing is a big expense. If you can’t live with your dad and you’ve been paying your housing expenses with financial aid that you’ll no longer eligible for then you don’t have many options.
Your best bet might be to work full-time to pay the rent and take classes as you can afford them. You may have to look for cheaper housing. Sharing an apartment with other students, if you don’t already, may help.
If you do intend to take classes part-time you’ll have to indicate that on your FAFSA. Part-time students get smaller Pell Grant a than full-time students. @kelsmom will know if it affects the amount of the federal student loan you can take.