Honestly, it's really not a big deal.
We have to recognise that there are attractive people around and being humans we are wired to look.
Expecting your partner to have eyes only for you is naive and an over-expectation.
Women drool over K-Pop singers as well but just don't talk as freely with friends.
Most men & women don't have any ability to pursue these attractions. If we do, then it calls for your disappointment.
The best way around this is to talk to him. Show him people you find attractive too. Share the experience in recognising good looking people together. Get his opinion on attractive men and women. (also, if he finds a woman attractive that does not look like you, it doesn't make you any less attractive. Everyone is attractive in different ways)
Also, you really should not be going through his texts with his friends. If you find something, you'd be upset. If you don't find anything, you may think he's deleted his chats. Nothing good can come out of it.
Anonymous