goose20, you know very well how volatile BTC can be, you should have set better terms for the loan. You agreed to the terms and got caught in the inflated BTC price. This is your responsibility, you need to fulfill the terms you agreed to.
It does not matter how much you have already paid or will pay, nor how much you gained or lost, what matters are the terms you agreed to.
I would strongly suggest you make this right as soon as possible.
Good luck to both on a quick resolution.

As for the retaliation feedback I would suggest removing it.