['For the last couple years I had a crush on a girl I knew from high school. I saw her recently with her boyfriend.', "That must have felt sort of defeating.  There is still hope if there isn't a ring on her finger!", 'Well it was rough for me to see her with another guy. I was hoping that we could have dated. Now I think about them together and get so jealous.']
Try not to feel that way.  If it was meant to be, it would have happened.  There are plenty of other fish in the sea!
I have had a crush on a girl that I knew since high school. I was bummed when I found out she now has a boyfriend. I thought maybe we could have dated but it is too late now.