“Liking” bikini pics

So my bf follows a lot of bikini models and likes their pictures alllll the time. One in particular that he pays special attention to. Which really irritates me. I know he’s faithful and he’s not actually gonna meet any of these girls but it bothers me that he still has eyes for other women...other (basically) naked women to be exact. A little background info-we just got back together after a long break so I’m still not completely secure in our relationship. Is this something I should bring up or am I just being insecure?