Hi, welcome
I'm sorry you are going through this testing time.
I think it could have been a comment that broke the camels back as they say. I've seen it many times whereby for a multitude of small reasons there is dissatisfaction in a partner then boom, they split. In fact I've done the same thing.
My first marriage of 11 years duration that was riddled with abuse from her she made a short comment in her usual sarcastic way then blew a smoke ring in my face. I could no longer bare to be around her and left. But thats abuse in a relationship.
So "where did I go wrong"? is a grab at anything that you can find to make you feel at fault... guilt seeking. When we seek guilt we can then at least focus on ourselves as to a reason the separation occurred. That give comfort for some but it often isnt realistic and I'll tell you why. See, just because they use it as the last straw doesnt mean the separation is fully your fault. What it can indicate is lack of discussion from them, lack of raising the topics to sort out or in some cases they have another love interest or pressure from family. If there is another love interest they sway towards making a small topic as the reason to split rather than the hard road of working it out.
So it does appear that a simple remark is imo unlikely to be the only reason for their split, more likely other reasons. The most important thing is not to blame yourself too much as he hasnt made the effort to seek counselling and hasnt explained themselves.
You'll be entering a grief period but be patient with yourself and when you are ready begin to believe in yourself again that you'll find someone that will make that effort and treat you far better.
Below are a few threads that might help. You only need to read the first post of each. If you need to talk to seek clarity please feel free to post again here or a new topic.
https://forums.beyondblue.org.au/t5/staying-well/depression-distraction-and-variety/td-p/275790
https://forums.beyondblue.org.au/t5/staying-well/meditation-words-of-wisdom-it-helped-me-for-25-year...
TonyWK
