My question involves an auto loan or repossession in the State of: Florida

I ignorantly co-signed for a vehicle with an ex and they are no longer able to make payments. I did some research and found out that I have an -or- title with my cosigner. In order to get the vehicle in my name alone I would have to refinance and then remove the other person from the title. I've asked to have the car back since the other party is no longer able to make payments, I was told no. I do not intend on keeping this vehicle for myself. I would like to sell it to CarMax and be rid of the whole situation. If I refinance the vehicle in my name alone, remove the other person from the title, and sell the car to CarMax is the other person able to sue me for any type of loss or damage?