For those who aren't okay with porn

I need advice, for yous that think porn is okay that's fine. But i dont. Okay so I've caught my man have porn in his history in the past. I confronted him several times. I explained to him why it hurt me and i still found it several times. He keeps saying he stopped he doesn't do that anymore. I just found porn on his phone again today and he said oh i just went on the site then backed out. It was a failed attempt. I'm not sure if i believe him but I'm really getting sick of his lies. He wants to get married but honestly i don't want porn in my marriage. I believe it is lust. I don't know what to do anymore.

And no me watching porn with him is not an option. I will never want porn in my relationship because i just see no point in it. You have your significant other you shouldn't have to get off to anything else.