I agree that the marriage covenant is a serious commitment in the eyes of the Lord and we must search the scriptures for truth in all things, but I can't help noticing three areas where your conclusions do not appear to match with scripture. Please comment as I would like to hear your thoughts on these areas.

Re-marriage of a divorced spouse: Deuteronomy 24:4
Her former husband, which sent her away, may not take her again to be his wife, after that she is defiled; for that is abomination before the LORD: and thou shalt not cause the land to sin, which the LORD thy God giveth thee for an inheritance.

Grounds for divorce/not bound to unbelievers: 1 Corinthians 7:15 But if the unbelieving depart, let him depart. A brother or a sister is not under bondage in such cases: but God hath called us to peace.

Lastly, concerning marriage after the rapture of the church: Mark 12:25
For when they shall rise from the dead, they neither marry, nor are given in marriage; but are as the angels which are in heaven.

Re-marriage of a divorced spouse: Deuteronomy 24:4
Her former husband, which sent her away, may not take her again to be his wife, after that she is defiled; for that is abomination before the LORD: and thou shalt not cause the land to sin, which the LORD thy God giveth thee for an inheritance.

You're attempting to use the above verse as an excuse not to reconcile with a spouse. You can't do that. The Marriage covenant in Christ is for life. For the Lord came to restore the marriage covenant on earth to how it was in the beginning with Adam and Eve. So Deuteronomy 24:4 doesn't apply to Christians today who are under the New Covenant of marriage. In Christ, a divorced spouse is not really remarrying their former spouse at all. They're ending their adulterous relationship to keep the covenant of marriage they made before God in the first place. Christian men who divorce to quickly marry other women have hard hearts. It's either they weren't even saved to begin with or they're baby Christians who are still very carnal.

"The Pharisees also came to Him, testing Him, and saying to Him, “Is it lawful for a man to divorce his wife for just any reason?” And He answered and said to them, “Have you not read that He who made them at the beginning ‘made them male and female,’ and said, ‘For this reason a man shall leave his father and mother and be joined to his wife, and the two shall become one flesh’? So then, they are no longer two but one flesh. Therefore what God has joined together, let not man separate.” They said to Him, “Why then did Moses command to give a certificate of divorce, and to put her away?” He said to them, “Moses, because of the hardness of your hearts, permitted you to divorce your wives, but from the beginning it was not so." [Matt.19:3-8]

Men who have truly had an encounter with the Lord Jesus Christ have been given new hearts that make them love their wives for the rest of their lives.

"I will give you a new heart and put a new spirit within you; I will take the heart of stone out of your flesh and give you a heart of flesh. I will put My Spirit within you and cause you to walk in My statutes, and you will keep My judgments and do them." [Ezek.36:26,27]

Grounds for divorce/not bound to unbelievers: 1 Corinthians 7:15
But if the unbelieving depart, let him depart. A brother or a sister is not under bondage in such cases: but God hath called us to peace.

Not being under bondage doesn't mean Christians are free to divorce and remarry. Far from it

"But if the unbelieving spouse separates himself, let him be separated. In circumstances like these, the brother or sister is not enslaved — God has called you to a life of peace." [1 Cor.7:15]

The brother or sister not being enslaved simply means the brother or sister are no longer able to function in the capacity as a husband or wife any longer, because their respective spouses have chosen to leave. We get married to be enslaved, in a good sense, to our spouses! 

"And having been set free from sin, you became slaves of righteousness...present your members as slaves of righteousness for holiness...But now having been set free from sin, and having become slaves of God" [Rom.6:18,19,22]

Being enslaved to our spouses means being a slave of righteousness for holiness. It means being a slave of God. You really have to twist the Scriptures to conclude that if a spouse leaves, divorce and remarriage is what "not being under bondage" means! This is confirmed to not be the case. For in the very next verse Paul places the responsibility of saving the spouse who has left in the hands of the husband or wife, who are to remain unmarried.

"For how do you know, O wife, whether you will save your husband? Or how do you know, O husband, whether you will save your wife?" [1 Cor.7:16]

A husband or a wife cannot pray with a pure heart before God, for the salvation of a spouse who has left, if they're continuously committing adultery, in an unlawful marriage, with someone else!

Lastly, concerning marriage after the rapture of the church:

Mark 12:25
For when they shall rise from the dead, they neither marry, nor are given in marriage; but are as the angels which are in heaven.

You are right! Children-bearing marriages do not exist in heaven. Glorified-body regenerating marriages, however, do. Because we die on earth, marriages exist for the regeneration of the human race. In heaven, where we don't die, marriages serve a different purpose. They're for the regeneration of our own glorified bodies! The Lord simply told the Sadducees that child bearing marriages don't exist in heaven, nothing more. The Lord was under no obligation to tell them of the type of marriages that do exist in heaven. They wouldn't have believed Him anyway. 

"...if a man’s brother dies, having a wife, and he dies without children, his brother should take his wife and raise up offspring for his brother...the first took a wife, and died without children...And the second took her as wife, and he died childless...Then the third took her, and in like manner the seven also; and they left no children, and died...Therefore, in the resurrection, whose wife does she become? For all seven had her as wife.” Jesus answered and said to them, “The sons of this age marry and are given in marriage. But those who are counted worthy to attain that age, and the resurrection from the dead, neither marry nor are given in marriage; nor can they die anymore, for they are equal to the angels and are sons of God, being sons of the resurrection. [Luke 20:28-31,33-36]

I've always known that loving marriages will continue after the rapture before I read Oden Hetrick testimony on heavenly marriages. He just confirmed to me what I've always known Check it out: http://odenhetrick.com/read16-20.html

I hope I've helped, in a small way, in answering your questions. God bless you.