Obviously, when a person who does not have biblical grounds for divorce remarries, he or she is technically committing adultery.
Divorce is rampant in the United States, and it is rampant among Christians and non-Christians alike.
Minor irritations need loving attention, but should not be allowed to rupture a holy relationship.
Obviously, a couple composed of two born-again Christians does not fall under the Pauline privilege.
Enjoy your present marriage and live in it to the glory of God without recrimination.