Understand that one is married until their marriage is legally dissolved.

If one divorces their spouse for any reason other than adultery or desertion on the part of their spouse, then, according to the Bible, they should remain unmarried, or else, be reconciled to their spouse.

(Matthew 19:9; 1 Corinthians 7:10-15)

Desertion occurs when one leaves another (whether there or elsewhere). It also occurs when one so abuses their spouse (either physically or mentally) making it impossible, or even dangerous, to live with them.