Shall I break up with him because of Instagram?

I've been dating this guy for almost 6 months now and something that really annoys me is when adds lots of girls on IG. I've talked to him before about this and said he doesn't know any of them and will stop doing it but, I can see him adding about 5 girls a week and with them following him back on occasion.

I don't know whether to let it slide or to just break up and not mention that I can see him adding these girls despite him saying otherwise because he might try and sway me to stay by saying he will deactivate IG, which I wouldn't want.

Shall I break up with him because of Instagram?
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