I am an old man of nearly seventy, 2oo3 years my aunt and cousin because of the project to find me to borrow 50,000 yuan, because at that time I was also laid off, life is difficult, there is no money to borrow him, but he is also a very hard-working person

I am an old man of nearly seventy, two ooo three years my aunt cousin because of the project to find me to borrow 50,000 money, because at that time I was also laid off, life is difficult, no money to borrow him, but see he is also a very hard-working person, did not find bad habits, helped him to do guarantee to find someone to borrow, that knows that after the success of his project, go to gamble, lose a few days, a house, a residential land,... He went through divorce procedures with his wife who worked at a branch in Wuhan of the Bank of China (I don't know whether it was true or not) and has not been heard from since. No, I had to slowly pay off other people's loans and interest with a little retirement salary. I had looked for his mother many times, that is, my aunt, and she did not provide information, and her wife only knew that she worked at the Bank of China in Jianghan, and his brother and sister-in-law did not provide information, and she also bought a house in Han. Please help me come up with ideas, what should I do?