Opinions please.

When my boyfriend and I first started dating we were intimate all of the time. We had sex often, we would cuddle often, and he would just so cute things like lean his head against mine and just be affectionate over all. Now I feel that he has become very cold and distant. He flat out told me no to sex last night. I'm just left feeling nonexistent anymore. I've begun reading romance novels because I have no intimacy in my own relationship. Last time I went on a romance novel binge, I was single. He tells me the lack of intimacy has nothing to do with me personally and that I shouldn't take it personally. Well it still makes me feel pretty shitty and I don't know what to do about it. 😔