u are the past

does it make senses when I say that U are always in my mind? 
I can't even forget U. 
U are the first.

&& always be the first.

but sorry to say that I must to forget U because U are the past. 
and I know that U are already forgotten me because I am not UR first. 

"it's difficult to wait for someone.. it's difficult to forget someone.. but the most difficult thing is to decide whether to wait or to forget ~"