Your use of the word ‘toxic’ is interesting, as well as this person slithering off to someone else at your lowest point. Which suggests to me you may have possibly had the misfortune of being in a narcissistic abusive relationship. Maybe research that topic perhaps that will make sense of things? You say you played an equal part of this failed relationship, have you ever considered maybe that really isn’t the case, maybe that only is what someone else wants/wanted you to think? You did say you tried to change, pray for your marriage, and make things work. So that suggests to me, odds are maybe someone else didn’t want things to work, maybe they even needed this relationship to blow up? Think about that.
So, you are going to need to ‘detox’ from this toxic relationship. And the healing path is not linear, there will be peaks and valleys, better days and bad days. But you WILL get better and that takes time, how much, who knows..that all depends on how much work you put into educating yourself..was this in fact a toxic abusive person? Have they gaslit you into thinking you have more responsibility for the problems than you actually did? One thing is for sure and pay attention..this new relationship your ex is involved in is destined to be even more toxic than your own, and it is only a matter of time before the mistress ‘catches it’. Healthy relationships don’t begin via adultery remember that, and you are blessed to have removed yourself from this situation.
However ‘wonderful’ things may seem on the surface for the ex, you don’t know what is going on behind closed doors. If you have social media, block and delete the ex, the mistress, any mutual acquaintances and move on entirely from that period in time as well as those individuals who side with the ex. It will take time so don’t let anyone tell you it is a set period of time you need to be better by. Do not wonder what they are doing, do not check their social media, do not ask mutual acquaintances for updates. That is not the path. The path is to get to the pinnacle of indifference about what this person has going on. Now by that I don’t mean anything along the lines of not praying for them, do pray that God will convict them on their wickedness and cause for them to repent.
Now look at it this way, you have made it through a bad experience and have wisdom to share with others who may face a similar dilemma once you’ve fully recovered and your cup is full. The reason you aren’t doing so great now is because you literally have to detox yourself from this person and it will take time. Try to slow your life down and simplify things as much as possible for the time being.
“O God, the proud are risen against me, and the assemblies of violent men have sought after my soul; and have not set thee before them. But thou, O Lord, art a God full of compassion, and gracious, long suffering, and plenteous in mercy and truth. O turn unto me, and have mercy upon me; give thy strength unto thy servant, and save the son of thine handmaid. Shew me a token for good; that they which hate me may see it, and be ashamed: because thou, Lord, hast holpen me, and comforted me.”
—Psalm 86:14-17
“How long wilt thou forget me, O Lord? for ever? how long wilt thou hide thy face from me? How long shall I take counsel in my soul, having sorrow in my heart daily? how long shall mine enemy be exalted over me?Consider and hear me, O Lord my God: lighten mine eyes, lest I sleep the sleep of death; Lest mine enemy say, I have prevailed against him; and those that trouble me rejoice when I am moved. But I have trusted in thy mercy; my heart shall rejoice in thy salvation. I will sing unto the Lord, because he hath dealt bountifully with me.”
—Psalm 13
“The face of the Lord is against them that do evil, to cut off the remembrance of them from the earth. The righteous cry, and the Lord heareth, and delivereth them out of all their troubles. The Lord is nigh unto them that are of a broken heart; and saveth such as be of a contrite spirit. Many are the afflictions of the righteous: but the Lord delivereth him out of them all.”
—Psalm 34:16-19