I had a really bad gambling problem (and still fight those demons all the time).
I'm lucky enough to have never gambled myself into oblivion, but when I have spare play money, I would usually end up at the casino.
At the end of the day, you have to be stronger. You have to tell yourself it's dumb, and remind yourself of the times you lost a bunch of money and how you felt afterwards.
I also find that gambling really desensitizes you to money. Like when I was playing a lot of poker, tens of thousands of dollars meant nothing to me. Nowadays it's odd to get a paycheck from work for like 1/4 of what I could make in one hand of poker. You have to retrain yourself to see money in a realistic and human way. It will take time. It will be hard. Be strong and you'll be fine.