NOT, Celia, that I juster am
   Or better than the rest!
For I would change each hour, like them,
   Were not my heart at rest.

But I am tied to very thee
   By every thought I have;
Thy face I only care to see,
   Thy heart I only crave.

All that in woman is adored
   In thy dear self I find--
For the whole sex can but afford
   The handsome and the kind.

Why then should I seek further store,
   And still make love anew?
When change itself can give no more,
   'Tis easy to be true!

Sir Charles Sedley

http://www.poemhunter.com/poem/to-celia-2/