"And I thought I should tell you / How loved you ___" (Honne lyric) (3)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
are
(Other definitions for are that I've seen before include "Era (anag.)" , "(We/you/they) exist" , "(We/they/you) exist" , "Is, in the plural" , "Exist; square measure" .)