Husband addicted to fantasizing about other women

In June I found pictures of other women, some screenshots from Instagram, some from I don’t know where... they were not naked, maybe some cleavage... some were people we know..

I caught him, he said he’d stop and was super apologetic..

2 weeks later I found more.. this time apologized but got defensive.. said he would stop..

all the times had no excuse.. was distant and didn’t wanna talk about it.

I’ve found them again and idk what to do.. he doesn’t really explain and admits to fantasizing about other women.. (not women we know this time)...

Idk if I’m mad or just upset.. should I be okay that he does this.. we both say actual porn is okay.. would you consider this porn.. should I be mad.. what do I do????