How did you start, and how’s it going so far?
Recognizing how he became addicted to gambling is a first step if you're interested in changing from that addicted state. Recognizing the root cause of your gambling addiction can be the first step to getting a solution for it.
There are people who started gambling as a result of a trauma they faced, some from peer pressure and all that. Remembering, the first reason you gambled can help identify the trigger. Identifying the trigger will help you be better able to control the urge to gamble.