There seem to be several phrases trotted out again and again irrespective of the problem the OP presents;
Red Flag
Narcissistic
The script
Stonewalling
Gaslighting
Porn addict
LTB
Having a breakdown
On the spectrum
Cherchez la femme
EA
E/affair
MH issues etc
Having seen in the last few days a post that presented facts of an admittedly horrible row but a marriage that could probably be saved with some introspection and will (with the OP stating she loved her husband and wished to remain married to him) quickly turn into 100s and 100s of posts telling/ordering her to LTB is this really a healthy place to post asking for objective advice?
Some posters are excellent in doing that but there are far too many whose views are so muddied by their own unique experience that the advice is actually very damaging.............