cf. TV Commercial
I know it—and to know it is despair
To one who loves you as I love, sweet Fanny,
Whose heart goes fluttering for you every where,
Nor when away you roam,
Dare keep its wretched home:
Love, love alone, has pains severe and many;
Then, loveliest! keep me free
From torturing jealousy.
— Keats, “To Fanny”