How old are you? If you're older, porn is sometimes easier to get an orgasm from because you're in full control of yourself. It sounds like you're younger though. So I'd say that since it's bothering you enough here to bring it up and ask if it's a problem, then it most likely IS a problem.
People can get addicted to porn. When you orgasm, your body releases hormones and chemicals, and they have an effect on the brain. This can be addicting. Also, our brains and nervous system is such that certain thought patterns and neural pathways get strengthened with use. It's like a musician learning to play the guitar. By constantly doing the same action over and over, the neural pathways get strengthened and it's easier to trigger them with less conscious thought. Certain ways of thinking act the same way. If you keep thinking in certain ways, you reinforce that type of thinking in your brain by strengthening those pathways. If you keep watching porn, you get into that habit and your brain keeps naturally going towards it.
I suggest forcing yourself to take a break from porn. Or maybe start by not masturbating. Look at porn, but don't masturbate. Then get together with your boyfriend and have a go at it. Try going for a couple days without porn (or masturbating) and try to stick to it. If you want to be more intimate with your boyfriend, think of things that you'd like to try that may be different and exciting and then bring it up with him. Order some toys maybe and have him use them on you. Maybe sometimes even watch porn together.
You have a boyfriend, and you both like sex, so be open with him about it and look for ways to make it more exciting for both of you.