Sounds to me like you need to go to Martha's Vineyard. I have gone the past two summers, and it it absolutely amazing!!!
Its deffinately better than cape cod. The cape doesn't have enough little unique towns like the vineyard does, and you can't really walk around any of the towns on the cape like you can in the vineyard.
There is just something unique about the vineyard that is different..idk what it is, but it is remarkable. It is a little pricey, but its worth it. You can also check out some of the other islands abound MA.
MV chanber of commerce
martha's vineyard online