1. Have you entered in to any written agreement with him about returning the amount lent to him by you?
2. Have you collected any blank cheque or security against the said loan provided by you to him?
3. Is there any evidence to prove that you had loaned him the said amount which he promised to return with in certain period and it was not a gift or repayment towards loan taken by you earlier?
4. If yes, then you can file a Money Suit claiming repayment of the amount lent by you with interest at bank rate of interest, damage and cost.
5. For filing the said suit, your shall have to send him a legal notice demanding repayment of the loan provided by you to him.