This, a million time this.
I’m in the same boat as OP, albeit heavier.
Stick to your nutrition goal, don’t ask yourself whether or not you’re going to train, give yourself a treat once in a while.
I haven’t lost a massive amount of weight (6kg since Jan) but the way i’m going about it feels sustainable.
I allow myself a night out with the wife, where we have a nice dinner, a nice bottle of wine, etc.
The rest of the time, I just stick to my plan, be it training or eating, and I don’t ask myself what I should be doing.