My father took out my student loans. Does he have to pay them?

Location: MA

Taken out when I lived in MA. I was 18 when he took my student loans out. Not private loans. Used to be Great Lakes, now Nelnet.

I never once touched the website or submitted information. At the time he was going to help me pay them off, (which is why agreed to go to the school), but he has since flipped on me and refuses to help, leaving me 100% with the debt.

Is he legally supposed to pay them? I don't know if I can prove he took them out even if he is, but I will have to figure it out soon, considering payments will be starting soon.

Author: burningthebird