I have a huge crush on this guy at work. He's older than me by 4 years and he has a girlfriend he recently moved in with last year. I only see him in the summer when he's home as he plays hockey in another country. I know I shouldn't think about him in that way but I can't help it. Hes never mentioned his girlfriend to me or anybody else at work- I only know cuz his friend told me about it. Should I forget him completely or let him know how I feel? I've known him for 3 years.