When is a marriage no longer worth fighting for?
When disrespect creeps in?
When one spouse is unfaithful once?
When unfaithfulness becomes the norm?
When one spouse wants out?
When one (or both) spouse(s) is not committed to the marriage?
When one spouse disregards the other spouse’s desires?
When the couple have no sexual life any more?

In Christian circles you’ll hear a lot about how God hates divorce. I believe he does. But I wonder, is divorce an event, like a wedding, or does it creep in slowly, as two people who promised to be one start drifting appart, or as one spouse sets something else above the marriage even if that something else is a threat to it; Or when both spouses lose respect for each other.
Sure, divorce papers, like a marriage license, are formalities that make something final. While people are not legally married or divorced until they sign the papers, the commitment to each other begins and ends before papers are signed.

One spouse may have left the marriage and be treating the other as a meal ticket or a servant. There’s no respect, no love, no commitment. I think that spouse needs a paper in the hand that legally frees him (and the abused spouse) to go on with life.

Some people will hang on to a defunct marriage for decades believing that not divorcing is what it’s all about. Like the engaged couple who don’t have sexual intercourse before marriage ( but indulge in everything else), believing that “abstinence” makes them sexually pure.