Jealousy or self esteem?

Hi does anyone have same issues as I? My husband watches a lot of porn and if not porn then he looks at his favourite big booty models who hardly wear anything. I feel like he is obsessed with it, obviously denied it at first but now he says yes I watch porn so what? He also tends to look at women when we are outside. 
​Should I get jealous? I used to go mental but I am trying to control it now because I can see he is getting fed up with it? 
​Or am I the one with issues? He loves me and is 100% faithful just this looking.... Help guys!