Differences in opinion

Marriage is certainly not without its challenges...very infuriating at times. I really hate when I get to the point that I am doing the weigh scales of pros and cons in my head, sometimes I wonder if this is normal. I feel like a traitor when this happens and I suppose these are the kind of thoughts that may lead some people to start the cheating process, istead it just boils up inside until I think I have found a solution that will make me less annoyed or angry, or until I realize I am being petty or unreasonable. SOmetyimes this leads me to prayer, figuring there must be some entitiy out there who understads all this better than I. But my complaints are usually the same, and may seem very insignificant to most. I know he loves me more than life itself, but I wonder if sometimes he loves me more like a companion or a best friend than an object of passion or as an equal; he so often reminds me of a faithful puppy, yet at other times I believe we are perfectly matched. How can the same relationship change so much from day to day?