Do you lend?

I used to often lend to friends, but over time I noticed that they were in no hurry to return the money to me. Once I asked one of them what was the matter. Why don't you give back what you took? And they answered me that they think that since I make money at the aviator game download casino, then for me it's easy money and I can earn more at any time. I do not agree with this position.