Did you know that God has Himself divorced? "And I saw, when, for this very cause that backsliding Israel had committed adultery, I had put her away and given her a bill of divorcement also, yet treacherous Judah her sister feared not, but she also went and played the harlot." (Jer 3:8; see also Isaiah 50)
Did you know that in Ezra 10 God commanded the Israelite men to get divorces from their pagan, idolatrous wives? So divorce in and of itself is not evil. It was sanctioned by God and commanded by God in certain circumstances.
Does this mean that we should get divorced? No. It means that we should recognize that it is a painful process which we should avoid at every opportunity, from dating the right person to working together for Christ in marriage. And like Christ, if our spouse has made a tragic mistake in fidelity, we can choose to be like Christ and show them extraordinary mercy.
Caveat: God's objective for us is to find Godly mates who help us do great things for the Kingdom. As I heard someone say once, "I think people should mate for life, like pigeons or Catholics."
"For the entire Law is fulfilled in in this one word: "You shall love your neighbor as yourself."—Gal 5:14