My boyfriend watching porn

I'm very reserved when it comes to watching porn and outward sexuality.... My boyfriend and I have been together just under a year now. I recently discovered he watches porn in the middle of the night when I'm next to him asleep :( I feel like I've been cheated on and like a worthless hole to him. But I can't bring myself to leave him especially before the holiday...... What do I do?

Do I confront him AGAIN about it? Do I pretend I don't know and keep pretending everything is ok when it's not? Do I have to leave him now? Should I look back ????