Instead of the first message, perhaps make a reference to your first meeting. Maybe something like “Those whiskey sours at the bar were so good, weren’t they? Looking forward to having drinks soon” – that is if you both happened to be drinking whiskey sours when you met, but the point is to make a reference to where you met/something you were doing in common, but make it brief…you don’t want to go too into details and come across as stalkerish!
For a while, you bite your tongue. After all, nobody wants to be "that wife" or "that husband." You look the other way and pretend not to notice or be bothered. You force yourself to not ask who your spouse is texting and not show how worried or hurt you are. You lay awake and stare at your partner's phone, wishing you could look through it but not wanting to cross that line.