You really need to take the time to learn and appreciate the food culture in Italy, oddly we have a very diverse and broad/spread culture all over the country. I personally don't enjoy Neapolitan cuisine that much but even that it's to say very little, you can literally travel a few km away from a city and find completely different food and cuisine. If you get bored of eating stuff in Naples, that's because you are only eating the same stuff every day. Try to discover more food and more cuisine even just in the neighboring town, because I can guarantee it's going to be very different.

Maybe I'm a bit biased because I'm from Bologna in Emilia-Romagna and I would say that's among the best cuisines in the world. We brought you prosciutto, tagliatelle, ragu', tortellini, lasagna, balsamic vinegar, etc etc. :) And even here there are a lot of differences in food from town to town.