I would have taken a different approach. Bringing up the subject of "hot girl" will only make him defensive and he'll just turn it around and call you insecure. ( even though you're not) . The next time he "shares" with you about hot girl. You should "share " too. Just act nonchalant and say you saw the hottest guy today, too walking down the street or at the gym ( you fill in the blank). Go into excruciating detail on why he was so dreamy. Do this every time he brings up "hot girl" When he "shares" you "share" I guarantee you, he will drop it like a bad habit. Did this on an ex-boyfriend and it worked like a charm