This goes for men and women

I used to get super upset whenever I see that my boyfriend liked girls pictures on Instagram who I thought where so much prettier than me and it made me think that he would rather be with someone like that and why is he with me if he gonna look at girls pictures. But lately I’ve noticed myself I can find girls attractive but I don’t necessarily want to be with them because I love my boyfriend! I just think they so pretty (I’m bi) so I was just curious if this was a me thing but also would it be weird if I saw a girl on Instagram that was pretty and showed it to my boyfriend? I appreciate all comments and thoughts ! I’m trying to open up my mind and my perspective on things