Feeling overwhelmed by my in-laws, any help?

[blue eyes]

My husband and I have been married for almost three years. When we met, he lived in the house next door to his parents, and when we got married, I moved in. For some reason, all of the sudden, I have felt the need to have a lot more space from them. For the last three years it has been fine, they are great neighbors and they never come over unless we invite them, but it feels like we spend a ton of time at their house all of the sudden. Their house is the central meeting place for the family. They have an adult child living at home, as well as another married child who visits the house with their spouse at least three times a week. We all live together in the same town, and lately I’ve felt like I really want to live further away. We typically spend time there 2-4 days a week, even if for just an hour. Nothing has really changed either, just now that every time it is suggested that we go next door, my knee-jerk reaction is no. I would prefer to only be over there once a week at the most, but since they always have “family” things going on, it seems as if it’s expected that we spend much more time together. Any time we turn them down for a meal or whatnot, I can hear the disappointment in their tone. I love my husband’s family and have never had any problems or disagreements with any of them, they are truly wonderful, I just really feel like we need more alone time. My husband and I have talked about it, but his mom still calls very often to see what’s going on. I do enjoy their company, but I need some balance. How can we create better boundaries even though we live next door?