No one's activites

Are there more stories like this ;-; where a character originally likes another character but moves on from them eventually


(preferably well-written but I have scoured half of the unrequited love tag already and only found a few TT)

"How old are you?" "Grown!"

All parties involved are adults. 
From silver foxes to working men

A more specific list of super hot older men, my DILF list: http://www.mangago.me/home/mangalist/989417/