Why did you leave Boston?

Why did you leave Boston? Why did you go to Boston? Those thick, languid questions. Several times a week I'm forced to create a coherent synopsis of my major life decisions. I don't like to blow people off, so usually I make some attempt at explaining the logic behind my move to Boston and my return to Seattle. Although I'm now considering giving in to the terse, incomplete answers that people accept. Way oversimplified answer to why I went: Because of a guy. Answer to why I came back: [HELP]. That's the one I haven't found an easy answer to yet - an answer that will stop people from prying into my decisions. If I say I hated Boston, people insist I must be crazy and make me explain how I could ever dislike such an amazing city, especially since I'm from the East Coast. If I say I was unhappy, I lost my smile, my vibrance, etc., they either don't believe me or want to know why. Did you hate teaching? No. People don't believe that I couldn't find a job that I wanted. But you went to Princeton. But you worked at Microsoft. Pblaaa. Was it because you and B fizzled out? No. Enough speculation. I really need to find a short answer that people will accept and move on. I could just say, "It's personal," but you can't really say that to friends since they expect more. How about, "Things just worked out that way."? It wasn't a clear decision. It was one of those brain-vs.-gut type moves. I listened to my brain. For the next few weeks, I'm going to try out the "Things just worked out that way" answer and see what happens. Grrrrrrrr.