Am I wrong?

So me and my ex recently got back together one of the issues I left him for was that when he’s out w friends he doesn’t take me w him like if they go drinking to a club and all there’s other girls there that they take (some do take their gfs too) or to a friends bday party. So obviously getting back I thought things would be different now since he said so, so today he tells me he can’t hangout in the afternoon because he’s going to a friends bday party so I ask if I can come with him so we can party together and he says no cause I don’t know anyone there? But obviously if he doesn’t introduce me? But then I asked so why is it you invite your other friends that don’t know the party person either but not me? He got angry and said he just wouldn’t go anymore and that we could go out instead? I asked him why couldn’t I just go instead of him choosing to not show up to a friends bday party anymore? He also didn’t post me for gf day because “I’ll post you when i want to post you”

Etc. he also said we’re on and off so he doesn’t want to post me ? But we’re already bf and gf.. is he gaslighting me ?