A love that will never materialise! This is a poetic verse! It cannot be translated word to word. It means i have fallen in love with you and i cannot even tell you that i am in love with you. This was written for God by one of the sufis and then he goes on to say that if you fall in love with someone they are sure to find out. They may decide to ignore, but they will know for sure.
I hope my friends i have explained enough.