The action you should take depends on your goal. If you’re aiming to make the best financial decision, you might calculate whether it would be more beneficial to invest $12.5k now, or to invest $350 each month instead. The latter would be possible if you decided to pay off the loan. However, if your decision is about feeling better, then paying off the loan seems to be the only option that would satisfy you. If you’re from the US, having a loan might be necessary to get future loans.