Husband addicted to porn

My husband has been addicted to porn and has been watching it since we were dating and I’ve caught him several times, he was even watching it at work when he was alone. And I found it on his phone again last night after he told me he wasn’t watching it anymore. He told me he didn’t have a YouTube account and he did because i logged into it last night and found more videos. I told him last time if it happens again I’m done. My heart is broken. What’s so wrong with me that he feels he needs to watch it. Any other ladies go through the same? What did you do?