The man I live with does not love me because I do not share his interests?

I think it's wrong for him to change your political affiliations - after all, you are a thinking person who is a voter in her own right, so you have a right to your different opinion. But, yes, you should try and share other interests to bring you closer together. Love is based on a sound friendship, which forms the basis of the relationship, and a friendship will also see you through the rocky times. You have to have some things in common to have a friendship, otherwise where is the affinity that a friendship thrives on? The Morris dancing sounds like fun, and he obviously likes exercise so you could get involved with that, if not running. I'm sure you have plenty of common ground that you could find together, if you both wishes, but your political and religious views are very personal. However, if he is only asking you to stuff envelopes for the LibDems, then I don't think that is challenging your integrity at all.