On any given day, there are weddings happening all over the world, some destined to fail, some destined to last for a lifetime. Very rarely, if ever, does anyone enter into a marriage that they expect will last for all eternity, or for all eternity and all eternities, and all eternities combined. For anyone who is in the millennial kingdom of God, you should expect that your marriage will last at least for an eternity, because there will be no divorces in the millennial kingdom of God.
If you are married to someone that you are not certain is your God-ordained spouse, ask the indwelling Holy Spirit Of God to clarify the matter. If your spouse is not sealed or raptured, and wishes to leave the relationship, you should allow them to do so. If they are sealed and yet, wishes to leave, they should know that they will become unsealed, and will not be able to rejoin the millennial kingdom of God at any point in time.
Marriages in the millennial kingdom will never fail if both parties adhere to two ground rules. The first is that when they become one in marriage, their bodies literally belong to each other. Accordingly, they should never withhold sexual intimacy at any time or for any reason, unless both parties have agreed to abstain for a brief period. The second is that they should never go to sleep angry because anger tends to fester when it lasts for more than a day.
The Lord God Father in Heaven, El Elohim