Good point BYOS - I'd forgotten that Ian is still living under that misapprehension.
When he said that Adam would have to go on his own I had the impression that Ian knew Adam was scared of going alone and was adamant, in his own mind, that he wasn't prepared to be the sort of spouse who was the keeper of the other's conscience.
But yes, imagining the whole village is laughing at you must have dampened his enthusiasm somewhat.