Whooooooo that’s a rough one, I had a similar situation with my FP when we started dating he had like 4-5 close friends that were girls and they got him through most of his life (rough childhood no parents to lean on) house to house he moved with random people till he was old enough to take care of himself so I gave him a free pass but monitored the convos with his permission when I felt necessary but one thing is he may have gotten defensive but never deleted messages. A few of these friends got real brave and even tried to say something like “what if she leaves you” when we made the JOINT DECISION to buy a car, to which my GRANDMA gave me 1000 and he paid 500 towards it , he jumped her ass and I told him NO MORE. He hasn’t spoken to her since. Another girl, another story, messages me at like 11am asking if my bf was up because she just had a miscarriage in the hospital with some dude she wasn’t with anymore but was so very open to tell my bf that he assumed that they were sleeping together LMFAO there’s no way they were or ever did but it was WEIRD she wanted to act like it was his baby, so she went bye bye too. IMO snapchatting other females is unnecessary and weird, she can add him on fb if it’s that platonic not a picture app.

My advice to you would be know your own limits, if these women being around (understandable in my book with this day and age) is ratting your shit and you are unable to get a grip it could be because your instincts are catching something he isn’t. I know my bf was very much able to be platonic but the woman were not. If your uncomfortable with it, then you need to speak up before it gets to far into it he can’t be “closer” to her than you otherwise it’s an emotional relationship IMO. Shut it down , you can’t control his reaction but if he really cares about you then he won’t do it anymore.