What to think about husband looking at other girls on Facebook?

I have found in my husbands browsing history more than 45 times him looking at other girls Facebook pages and some of them are from his past. Every time I ask him why he's looking at their pages he says there's nothing there they are old friends he just wants to see how they're doing that's not how it looks and makes me feel extremely uncomfortable I have told him every time I found out how it makes me feel and he still continues to do it. Maybe I'm approaching this wrong but it really tears me up inside to know he thinks what he is doing is innocent. He's not cheating he's not talking to them or interacting with them on Facebook he's just looking. Any suggestions to help with my insecurity I feel so disrespected 😟