Go, Jealousy, Tormentress dire;
On Lovers only seize:
In Love, like Winds, you fan the Fire,
And make it higher blaze.
But Friendship's calmer, purer Joy
Thou dost not heighten, but destroy.
Mary Barber
http://www.poemhunter.com/poem/on-imagining-a-friend-had-treated-the-author-with-indifference/