Okay Mc has trust issues which are the result of his past relationships which is causing him to project those insecurities on to the Ml, that being said Ml isn’t wrong for not sharing who the person is since it isn’t his secret to tell. Imagine the Mc was the one on the opposite end I can imagine he wouldn’t want his secret to be revealed either. Ml did offer a good solution calling the other dude (forgot their name) and asking him directly but regardless the issues is that Mc wouldn’t believe it cause he already didn’t believe when the Ml told him to call and ask thinking that they are in cahoots. So technically neither of them is wrong ( ̄へ ̄)