What would y’all do

I’ve talked to my bf and his friend both about how I don’t appreciate them sending women to each other on social media. They’ll find someone attractive and send that lady to each other. They agreed it wasn’t right since, I mean, he has a gf ?. But now I’ve noticed my bf is starting to just delete the msgs between him and his friend. Then one day I caught him receiving more pics of girls from his friend. Idk what to do.