You don't necessarily have to find someone that cares about what you find interesting ... you have to be willing to put yourself in a situation in which you experience something you wouldn't find interesting at all. Obviously I'm not saying that you have to dispose of your interests, nor am I saying that it's not possible to eventually find mutual interests (nor am I saying that it's impossible to find a partner that shares your same interests); but that by limiting your potential connections to only things that you find interesting, you by-definition limit your scope.

To give an anecdote ... me and my wife are about literally the most opposite of people. She likes almost nothing that I like, and in many ways, vice-versa (opposites attract, as they say). I've gone to my share of nights out clubbing with her (which I mostly dislike, other than being with her), and she's endured way too many a geeky discussion. Eventually we settled into a groove and found mutually interesting interests :)