You'll liked him for 3 years, more precisely when you were in junior high school until now high school, but he never liked to know that you liked him, because you secretly liked him.

One day when you were walking to the canteen with your friends, you heard from another student that he already had a girlfriend who was beautiful and popular and in the canteen the two of them were eating together, at that time you looked in that direction and then immediately looked away.