Do you ever think about your first love?

I’ve been with my husband for five and half years and married for less than a year. For some reason I keep thinking about my high school boyfriend, which was many a boyfriend ago. It started a few years ago and he would just pop in my head every now and then. This made sense at the time because my husband and I were going through a rough patch and psychologically my brain was reverting back to a happy place of relationship bliss. But now, we’re married, pregnant, things are good, and every now and then I think of my high school boyfriend.

Am I the only one who this happens to?