AITAH for not wanting my boyfriend to have friends?

Ok so me (18f) and him (19m) have been dating for about about 7-going-on-8 months now and it’s been one of the rockiest relationships I have ever been in but I don’t know if it’s because of me or him. I would not say that I am an insecure person as I have had past relationships with men and never had these issues but the problem is that my boyfriend has a lot of close friends that are girls…a lot. I have tried to bring it up to him about my discomfort for him going to their houses without me and getting into situations that includes them being close. For background, one of the girls he is super close with is a girl he briefly talked to before me but said that it just was boring and fizzed out. He has two girl best friends that we will call McKenna and Carrie whom he is the closest with. He snaps me hanging out in their beds and even though McKenna has a boyfriend he will do the same thing with Carrie too. I brought these things up and he tells me “I have known them way longer than you so if you think that I will drop them for you, I won’t” (btw I met him a week after them). At this point I just got used to it when I would see his location at the girls place but then I found out that Carrie invited him to a birthday party for her and not me. This hurt because I’ve known her for two years and she just met him this year and I texted her and all I got was that he was closer with the group and a bunch of bs. Turns out he was with the group while I was home texting her this and he texted me saying he hear her talking shitty about me and calling me all these names and he decided just to sit and listen while she read out our private messages between her and me. Even still he goes to the hottub with the girls without telling me and I’ve gotten a few hey girl texts about him texting other girls but I have never seen real cheating. We broke up for a day because he “wanted the college experience” and decided to tell this girl that I was mean and lying so that he could feel better about this (the only reason I know this is bc after we got back together I accidentally saw him texting a girl). He made plans the day we broke up to get drunk with a girl yet cried when I went to get lunch with a guy friend. Even now I just feel an itching feeling that idk if it’s guilt or a gut feeling. I do feel terrible for thinking he would cheat on me but there’s been so many times he did some weird things- even more than what I told you. Idk though if I’m overreacting. So AITAH

Edit: I forgot to mention that he has all social media notifications off and a password protected Snapchat so to open Snapchat you have to put in a password- not a log in to his account but a password to open the app.