My boyfriend chooses porn over me

I am very lost and confused right now and I have no idea where to go or what to do next. I need some advice, I'm in a very desolate and alone place because of everything that has happened. Let me start off by saying that I've been with my current boyfriend for 9 months. We have openly discussed spending the rest of our lives together, and both of our families have given us their blessing to get married. We've known since the beginning that we were a really good fit, and I honestly love this man with all of my heart and I never want to live without him. My problem is that lately, I'm being turned down by him and avoided sexually. My boyfriend is a very sexual person, and I am as well. I thought we had a completely open sexual relationship. About two months ago I startled him while he was on his phone, and noticed he was looking at porn, thus the reason for his being startled. When I mentioned something about it to him he openly denied it, 100%. He tried to tell me I was crazy and imagining things. Now, two months since this happened, we are at a very scary place in our relationship. I never even imagined he would be using his phone to view porn, I know this makes me seem incredibly naive, but he was always very good at hiding it. Unfortunately, I discovered a setting in his phone titled 'Website Data', and because my boyfriend has only been deleting his Safari history and not the website data and cookies, I have been able to see the unbelievable amount of porn websites he visits. I am honestly okay with looking at a little porn every now and then, I will admit that I do it myself on occasion. This is not our issue at all. Since I've started paying attention, I'm noticing that my boyfriend will get out of bed with me and go to the bathroom with his phone. I listened at the door one day (I know I sound like I'm insane, but just imagine how it feels to watch the love of your life lock himself in the bathroom to jerk off while you're in his bed, naked) and heard him helping himself, and then watched as he pitifully tried to cover up what he had just done. I was right there, naked and willing, and yet he chose the porn over me. When he doesn't watch porn, we have sex consistently every day. This past week has been the worst so far, as I looked up some of the sites he visits and the women greatly resemble his ex, who he has mentioned was very good in bed. Yesterday was the beginning of the end for me, however. He chastised me for being "horny", saying that I always wanted to have sex and he didn't think he'd ever meet someone who wanted to have sex more than himself. It almost feels like he's playing a game with me. Like it's fun for him, to watch me get all bothered and teased, and then deny me and go jerk off to porn. I just do not understand it. I brought up the bathroom incident, wanting to tell him how horrible it had made me feel, and he dismissed it yet again, calling me crazy and saying I was imagining things. I just want to talk to him about it. This place we're in right now, it's SO SCARY. I am absolutely head over heels for this man, he is the only person I want to be with for the rest of my life. And now he doesn't want me, he would rather have porn. Am I putting too much pressure on him about sex? How do I back off without him thinking I'm uninterested? And why should I have to back off, yesterday he got himself off at least twice, once in the morning and after I had already fallen asleep last night. I wanted to have sex with him yesterday and was turned down, again, but after I fall asleep he does it himself? Why not wake me up? I need some male insight here, I'm not the kind of woman who is offended by porn or being sexually deviant. I am faithful to my boyfriend and willing to do what he wants to keep us both happy. How do I tell him this? When he won't even admit to me that he watches porn? How do I approach the subject without him running away? Do I need to act uninterested in sex to make him feel attracted to me again? Anything will help, please. I want to be with this man for the rest of my life, despite all of his faults, but I can't have porn as the third person in our relationship and I am completely at a loss of what to do.