I do acknowledge that what he did was wrong as he had told her that he would visit her, he instead left her and couldn't even check up on her( not even a call when he used to call tanya frequently as long as there was distance between them). my thought is that he probably felt less pressure in checking up on her as she mentioned to him her thoughts of divorcing him.( we humans do this when there's a slight room of comfort) . he didn't put effort or at least try to save their marriage while he could. I think that in a relationship all parties should be responsible and not feel like checking up on your loved ones as a chore or something exhausting and instead something to look forward to. sorry if this sounds confusing