Maybe that's it - the two of us have so little in common that any change can only bring our personalities closer together.

I suppose this is another disillusionment hurdle I'm yet to really get over, when I was much younger I thought marriage was meant to be irreversible, and now that it clearly isn't it's easier to think of it as a convenient way of living together as long as you need to with some benefits from the tax office. Which seems a bit cold.