Divorce is sin when it has no reasonable basis.
This basis are adultery, abuse or unbelieving spouse who wants to leave. People who do not follow the Bible apply all together different standards and I do not consider them in this article , however they will certainly be able to benefit if they are open enough.
In the modern world people can divorce virtually for any reason.
It is common place to see people who divorce because "they are not in love any longer". They have fallen out of love because the had very shallow love, merely sexual attraction and/or emotional attachment. Many people also get married in order for the spouse to make them happy. They usually demand all of their needs to be satisfied without making any effort to satisfy the needs of their spouse, it is simply selfishness, it causes many conflicts and eventually leads to divorce.
Besides a secular marriage is a mere contract but Christian marriage is a covenant between man and the wife and God Himself. That covenant implies that both of them commit before God to love each other which means that they will look to satisfy each other's needs in mutual respect. Divorce is not even an option here unless...
someone breaks this covenant by abusing their spouse or betraying her or him and this is sin, sin that has its root in selfishness while one that was abused or betrayed might not have sin the one who broke a covenant is always guilty of sin.
When divorce is considered a sin - by Edyta Tehrani - Helium
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Yes, to you, your adultery would be a sin.
But on the other hand, if you went back to your ex, you would be encouraging more abuse
In the end, you have done what you had to do, to get away from an abusive situation.
You sought and found love. Love is never wrong, your new relationship has love not just lust, or there would not be marriage under consideration.
So do what you have to do to feel better, pray, talk to your priest, talk to God....
But do not go back to your ex. Seek love that you have, and the divorce you need.
So you have not done things in the "right order" i.e. divorce then finding someone else...
But God will forgive you if you are sorry and admit you are sorry. Your husband will most likely not be forgiven any time soon, why?
I am willing to bet he does not consider he has or is doing anything wrong.
And that is at he heart of sin and repentance. Forgiveness. First we must ADMIT that we have done wrong, then we can move forward and grow. This is the whole point of doing wrong, suffering and sin...to LEARN from our mistakes and GROW.
To thy own self be true
And talk to God....his yoke is easy...