How do i show an ex iv moved on.....?

i rarely see him to be honest he knows im inlove with him (WAS) i always check o see what hes been upto on facebook he does the same with me but how do i make him thnk i have moved on and dont feel the same as i did were not friends on facebook do u think if i block him hel think im not interested and its obvioous i dont want to lok at his profile