I think my parents should pay for my college
Do you have trouble paying for your college yourself?
I have no financial problems, I just think my parents should pay for school.
It is good to have your parents help you when you need help, but you shouldn't expect them to help you when you are not helping to contribute. They can use the money for other things that they need instead.
I hate it that I have to take the loan instead of free money.
You can ask them for help. If they see you are willing to pay part of it then they will probably be willing to pay the rest.