anyone else’s bf do this?

so i’m not sure if it’s fully a joke, which is the way i know he would say he was meaning it and that’s kinda what i get from it too, but i’m not sure cause it just started recently and i don’t know where he got it from. he’s been saying i’m “talking to my other boyfriends” a lot when i’m on my phone or distracted with something on it and not giving him any attention. like literally 20 minutes ago, we were outside with his little cousin who was asking me to chase him with my bf and he goes “no she can’t she’s busy talking to her other boyfriends” and i just laughed but then i thought about it and i was like, what? i don’t know if i’m being paranoid or if its one of those things where someone is accusing or saying you’re doing exactly what they’re doing and i need to be paranoid about it.

side note// we’ve been together a year and a half and in the beginning i caught him sliding up on other girls shit on snap calling them hot and complimenting other girls titties or calling them cute and then i think it was in march, he caught me with an finsta i made to sell (not fully nude- ik still wrong) pictures of me and a friend and he found it. probably a month after that was when he started with saying it. comments?