However, if you are someone with weak willpower, it will be very, very difficult to overcome such addictions though it isn't impossible or anything.
The will power is truly an important factor in continuing to letting go of an addiction, but still those people who in spite of having enough will power won't be able to let go of he gambling addiction because they are somehow wired in a way that gambling is the only possible entertainment in their lives. The people who play online multiplayer games often have same levels of addictions like those gamblers and they are also not able to give up on their gameplays even if their will power is strong.
I think your relations matter more than your will power to let go of an addiction. If someone that you truly love in your life makes you emotional in a way that his/her words touch the inner core of your heart which really makes you feel that you're not doing a good thing, and because of that your loved one is getting hurt. Only that emotion can stop some addict to give up on the addiction otherwise, addicted people will never let go of their addictions.