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.
Yeah you should feel guilty because convincing people for gambling means you are committing crime, not everywhere in the world but in most of the countries. You should do opposite of this. You should try to prevent gamblers from gambling and tell them the bad consequences of gambling. It is much better to convince them for some positive and respectable work.
I think you should serve your energies for some good work instead of wasting time in convincing people for gambling. After doing this work they will become gambler and you will be their boss. You are thinking to be the cause of gambling in your community. Think better for your loved ones and not to bring them toward gambling which is not acceptable to respectable people.
This is why that we need to take responsibility for people that become a gambler, and we need always to remind them to not playing gambling every day. We still need to watch them, and in their side, in any time they played so, we can tell them that their time in gambling is enough and they need to leave the game. They will accept for what we did because we want to make sure that they do not become an addicting person in gambling and besides that, we don't want to see they are loss bigger money.