I felt guilt for convincing the people to come into gambling when some of my friends I invited them for gambling got addicted very soon so we need to pick the right kind of peoples for making them gambling if we have the poor people to make into gambling then it may affect them and their family life.
So I think you need to help your friend if somehow he becomes an addicting person in gambling because you are the person that convinces him to enjoy gambling. Maybe he cannot get what the meaning of enjoying gambling and makes him continue playing gambling and makes he lose his money. No matter what, he still your friend and it is your duty to get your friend and leave the gambling games. And if we want to convince people to enjoy gambling, we need to select who is the right person that can know what gambling games are so he can avoid becoming an addicting person in gambling.