Hi Tracy and welcome to the Forum.
If he ran the debts up for family reasons and you managed to save at the same time you may have a moral responsibility but no legal one. However, if he gambled or drank the money for example you have no reason to use your own money to pay his debts. It would only leave him capable of doing it again.
It may be better to seek some free advice and if you are to help him this would damage his credit file and make it very difficult for him to run up more credit.
