A pal didn't pay me back - what can I do?

He had agreed that he would pay me back fully in two years and that he was expecting business to pick up, but never did.

He had agreed that he would pay me back fully in two years and that he was expecting business to pick up, but never did.

Dear Stephen,

I gave a loan of €30,000 to an old friend of mine, who is an agricultural contractor as well as also being a farmer, three years ago when he was going through some financial difficulties.