I went behind his back.

At the beginning of my relationship with my bf I had told him I watched porn. Months later he said he didn’t feel comfortable with me watching it so I stopped immediately. After months of not watching, Last night I was feeling horny and i watched some and i got really wet. I haven’t even been able to get wet with my bf for so long. I blamed it on my birth control but i changed it and i still wouldn’t get wet. But when I watched porn i did. But now I feel like I want to have sex with my boyfriend even more. But I don’t wanna go behind his back to watch porn if he doesn’t want me doing it. And idk why I got wet with porn but not with my bf. What’s going on? What do I do?