Need advice

I know this is an improbable thing and miniscule issue. However it's been on my mind for a couple of days. So I recently was on a flight where I saw someone I wanted to talk to (yes a pretty someone). I didn't talk to them. I know the chances of me ever seeing that person again is next to impossible. I have thought it would have been nice to find them somehow and talk to them, but I rather just let them be and go on with their life. So what I'm asking is how should I move on from this? I could write about it. I think the best thing is for me to understand that in the future I should take risks because we are never guaranteed a second chance in this journey of life.