Very little details are the ones that make me hold on.
I urge you to look to yourself for your hope. I urge you also to appreciate the interactions, but not allow them to dictate how you feel about the situation. Emotions will be all over the place, but if you allow them to dictate your hope or your actions you'll be in trouble. Stay focused on your plan, on your mission, and evaluate your actions against your plan. This will keep you in a rational place rather than reacting because of your emotions. This way you can observe the "grand canyon" from a consistant vantage point, without it impacting the actions you take.
One other point: I think PMA is critical to not only a good experience in marriage, but in life too. However, using the power of positive thinking to avoid realities that you don't want to engage in isn't healthy. Denial doesn't do anyone any good. Accept your thoughts for what they are, accept your emotions for what they are, make sure you've got a plan or a code you want to live by and then choose your actions based on how well they accomplish goals in your plan or whether they reflect your code.
“No problem can be solved from the same level of consciousness that created it. ” – Albert Einstein