for 3 years???? and his name just appeared now, like right now???
i think u are just attracted to him...nothing more
If u think he is also attracted towards u... Then u should definitely give it a try and approach him... In my case it was for 5 years n finally we r in a serious relationship.... All the best..!!!
What can you do? Try and track him down via face book, friends? Or just accept that he will forever remain a crush in your heart and set off to find someone you can actually enjoy a relationship with.