It happens as it always does. You went to sleep, dreamed about something else. You woke up and didn’t miss them anymore. Then your period comes.
Men should understand something important about women. We don’t obsess or stay attached unless we, for some reason, want to. We have one or maybe two eggs to either get fertilized every month, or pass with menstruation, and none to save for a rainy day.
So if you don’t stay relevant in a woman’s life, she will pass you just the same. Maybe with one egg, maybe with two, but seldom with three.