One of the most effective ways to develop the strength to heal after a break up is to develop your spirituality. Being spiritual involves becoming in tune with the true desires and needs of your soul. Once you've made that connection, you'll likely realize that the relationship was hurting you instead of helping you.
Turn to your church to help you find the true meaning of your existence.
Read books that help you get in touch with your inner self.
Spend time meditating on what's really important to you.