I can't really remember if anyone has shared any gambling challenges with me but if any chance someone gave to share his challenge about gambling firstly I don't need to criticise the person or make the person to feel the addiction he is going through is a bad thing.  I'll try my best just to make the person feel free after he might have finished saying his problems.  If i dont judge the person by my words I think it is easy for me and for the person to accept and see reason why playing gambling is not good for him with his present condition.

Op just try your best to be friendly and soft in your words you may be able to help him to come out of addiction.  The reason why people still continue with their addiction problems is because they have nobody which they feel can handle their addiction better.