I appreciate I don't know you in real life, and I know the very smallest part of you from what you've written here, but, honestly, I can't see anything weak or unstable about you. It's probably not a helpful point of view, but after all, you HAVE something to lose where many people don't and you have a smart stable self to present which isn't a fake, it's just not the whole story. If you brought your level of focus on gambling to a charity or altruistic work, you'd get an award for it. You'd still be an addict and it would still be unhealthy, but people overlook that if we're doing something they see as useful.
If you were weak and unstable, your counsellor could just tell you to STOP and that would be enough. The problem seems to me that you are too strong for that to work. You need more help than that. If it's at all possible for you to level with your counsellor, that seems to me like a good place to start. They can't help if they don't know exactly how big the problem is. Then, are there any general addiction support groups in your area? Talking to other people who have lived the exact same situation of not being in control might help, even when their addictions are different. I'm going to guess you've browsed this forum for other ideas, but perhaps visit some of the other forums, they might give you food for thought too.
Have you spent much time exploring what triggers you and what problems you solve by gambling? That might be a more effective way to quit and repair your life for the long term rather than by focusing on the gambling itself.
“We think too much and feel too little.
More than machinery, we need humanity.
More than cleverness, we need kindness and gentleness.”
Charlie Chaplain in The Great Dictator