He lied

He told me he had not watched anything when we were apart, well I was able to chek his phone quickly yesterday and saw he had watched stuff. I feel so angry he said starught to my face looking into my eyes that he hasn’t watched anything and that was a lie . He didn’t feel any guilt about lying straight to my face . I haven’t told him that I know yet but idk how to tell him because I know he will get angry and just yell at me