I cannot forget an old friend – despite no contact for years. How do I get past this?

r/

I (38F) had a best friend when I was 18 (F) and our friendship turned into a short relationship. When it ended I was pretty heartbroken as I had lost my friendship too. We spoke a little at aged 18 and again when I was 21 just when I was getting married, but I still think of her over 15 years later. I still miss her friendship. I’ve never met anyone that meant more to me as a friend than she did, and I’ve never found her again on social media or I would reach out. Do any of you miss a pass friendship? Do you feel friendships in your younger years carry a different significance than those is your later life?

TLDR: I cannot let go of old friendship