I can see myself in this. Face blindness is really a problem for me, too. Thankfully younger people (who all look the same to me) have taken up tattooing themselves, which makes it a lot easier to identify them (because it's easier to remember than a face)
What nobody says is that, face blindness is a protection mechanism from our brain for protecting ourselves from losing our minds. When you see your friends growing up and don't remember when you were kids, or when you see the kids at school and you think 'they are younger than I were when I was in there', that's your brain using this mechanism. Forgiving all the faces that we had back then, so we don't feel so much like growing and getting old. That's why your family will always look like they are right now, and you need to make an effort to remember them when you were kids, and remember them in their kid form.