Friend took money for business not repaying since a year

Hello Lawyer Sir, Last year I helped a friend with securing loan through me for one event contract of govt. This loan was at very higher rate of interest through local people. THe govt dealyed in payments due to which I have to pay interest for almost 12 months. which amounted to 1.8 lacs more on the loan of 5 lacs. During whole of this i was only returned 2.5 lac once. This guy is not responding to me anymore and we do not have talking tersm due to this. how can i recover my money from him for which there is no legal proofs. all tansactions was done through hand.