Call him out on it. 'You agreed to text me goodnight. You didn't do that last night, and it would mean a lot to me if you stuck to that' There could be plenty of reasons he didn't text you, but he needs to know that he has to stick to his word. Otherwise how can you both build trust in each other?
Well, that's what I'd do. Dh nearly broke our rule to have a date night once a week early on and I told him that it was our agreement and was important for us both to feel safe. Since then he has been flexible about making other arrangements if the logistics are really difficult for date night. It might be a small thing but if it helps your safety then make it clear that he needs to stick to what he promised.