I know that in my younger days when I was first in the service and sowing my wild oats that this was true for me. I was much more hurt and damaged when I fell in love with a girl in high school who I was very good friends with and when I told her she “just wanted to be friends”. I still think about her to this day and still get sad. Even though I am married to a wonderful woman and we love each other dearly.
I think every man has one girl from his youth that stays with him, no matter how real the relationship was.