Welcome Crispy...if you are having a hard time sticking to your one drink rule with friends maybe they need to be replaced. I know that sounds harsh but why hang with people that bring out the worst in us. That can be scary and dangerous.
I was always an at home drinker. Never went out with friends -only spouse. I found it easier to stop because I didn't feel obligated to drink or have to explain myself.
But if you can continue your drinking responsibley at home with supervision then maybe that's the way to go. For now...but I'd consider stopping all together since you are here...it can only get worse -never never better.
Wishing you peace and strength.