"We [bishops] understand the pain of those for whom divorce seemed the only recourse.
"We urge them to make frequent use of the sacraments, especially the Sacraments of Holy Eucharist and Reconciliation…
"We encourage divorced persons who wish to marry in the Catholic Church to seek counsel about the options that exist to remedy their situation, including the suitability of a declaration of nullity when there is no longer any hope of reconciliation of the spouses."
--U.S. Catholic Bishops, Marriage: Love and Life in the Divine Plan

Resources:

• Divorce FAQs
• Annulment FAQs