Advice girlies?

Hi girlies! I have a quick question. Would you be upset with your boyfriend if he still follows the girls (Instagram) that he would hang out with to go on dates and talk to when we would be broken up? We were broken up in the summer for four months and from what I know it’s not like they all stayed as friends with him or talk. He doesn’t talk to them or anything but it makes me feel disrespected. As if he’s just keeping them there so that in case we break up he already knows who he can go running back to as a back up and like at the same time he’s also keeping in touch with what they’re doing cz he sees their posts. Does anyone agree/disagree? Or am I just insane🥴