How can i get my money from my friend, which i gave a year back through personal loan ?

Hi Friends,

I am from chennai and one of my friend was looking for a new business and decided to start up a BPO. they were in need of some urgent money so they needed my help, he was my 6 year friend from college days so decided to give them 1 Lakh, and through a personal loan. this was arrivedat lots of condition like 1 year pay back, paying EMI to bank and others unfortunately i did not take any writted document except for the photocopy of the cheque which i gave it to him.

now after 18 months they have shut down the company which they started and denies to pay my money back. can somethin be done to get my money back. will the photocopy be a legal document and can i take legal action against him. Kindly suggest me friends.