So, this childlike MC, finally completely screw the pooch...
It was obvious that this was the direction the story would go. Kudos for "at least" trying to "clear his conscience" after the fact. It wasn't a selfless gesture, it was mostly done for his own satisfaction, almost like bragging that he was righteous, but, also bragging that someone else wanted him. The fact that he was confused that Diana didn't want to hear his righteous "Mea Culpa" and ritual flagellation, only shows that he wasn't doing it for her, or for their relationship, it was all for him (as usual).
It is also plainly obvious that the "No Confrontation" that Diana chose, is the only adult option. Again I say, I don't really like Diana, but, she's the only grown-up there. Chris is just the drop that filled the cup.
By the mighty whiskers of Crom, what a child this MC is... can't even cook, or buy groceries...
Peace
