For Christians, it is by far best to remain single or reconcile after divorce.
depends...
If your spouse leaves you and commits adultery its best to seek a new spouse. Man (and Woman) should not be alone. If the spouse who leaves is unsaved and shows no signs of beginning regeneration then the one who was left can and should move one.
But if your spouse who left is (1) not in a sexual relationship with another and is either a christian or moving that way reconciliation should be sought.
Be the stoic myrter while ones spouse has moved on with their life only causes pain and is not God glorifying.
Not always, of course. People change and people grow up, but the general nature of the person when they graduate from high school is not all that different when they turn 60. The serious, discliplined scholar or athlete grows up to be the serious, discliplined businessman. The jerk jock who thinks the world revolves around him grows up to be the jerk boss or politician who thinks the world revolves around him. The sweet, helpful young lady grows up to be the caring nurse, teacher or mother.
And so it is with people who divorce and remarry, as a general rule.