It is good for your husband to help you as it is good for you to help him, but if you ask about the obligatory duty of your husband then the answer is: Husband is responsible to spend on all livelihood expenses of his wife including accommodation, food, clothing, medicine etc. He is not responsible to pay for your loans which you have taken for yourself and not for both of you or for your livelihood expenses.

Your student loan was taken by you and the money was received and spent by you and not spent by both of you. Had your husband spent any amount of that loan, either for his own expenses or on your livelihood expenses which is his responssibilty , he will be then responsible to repay that amount.

Wassalam.