My boyfriend chose me over another girl but I'm worried he still likes her. Should I confront him?

Anonymous
Me and my boyfriend recently started dating (about two weeks as of now), but we talked for most of the summer. Right before we became exclusive tho he went out with a different girl that he supposedly had had his eyes on before. I found out from my friends that he had been seeing her and seemed really into her, and so I told him he had to choose. He chose me, saying that the other girl didn't have as much in common, but he still likes all of her insta pics and kind of stares and acts a little different whenever he sees her. Like I'm all good with him being friendly to her but should I confront him? Is this normal?
My boyfriend chose me over another girl but I'm worried he still likes her. Should I confront him?
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