I find some of them very confusing, i.e. "why can't I be like some typical guys, beer drinking sports fan couch potatos who can have casual sex aside here and there and not make an issue out of that,don't even think about it, let alone having any guilt?"
what is confusing about that statement? he told you he is having more than casual sex with someone. it has become an issue, an item, he's fallen in love. and its all he thinks about. forget the guilt part. that is his issue to deal with. its nothing you can change.
what you do depends on whether you want someone who is exclusive to you.
