Forgetting the names of people who were significant in my life a decade ago.

So the other day I was talking to someone at work and for some reason his mannerisms reminded me of my ex boyfriend from when I was in high school. We dated for about 9 months and at the time he was quite "important" in my life. I sat there realising I'd forgotten his name and wondered how on earth that could be possible lmao. This morning I thought "ok I could spend ten mins trying to recall it", but nothing 🤷🏼‍♀️. Similarly Ive looked at photos of me from a decade ago with friends and im either like "who even is that?" (& It's not just one photo, they are in dozens over a years time), or sometimes I'll recall their name and a rough idea of how we met but I don't remember anything else about them. It's super weird to me. Is this a sign of SDAM?