Julie - your writing took me back 10 years when I feel like I was in the same state of mind as you. I questioned if it was just me or if there was something really wrong with the marriage. It took me 19 years to realize that we wanted different things from life and we had grown apart. We had love for each other but had different ways of showing our love - in the end neither felt "heard, seen, or understood."
Talk to your husband and see if he is open and willing to listen to you. Most often, people don't have to do too much. It is the small things to show that you still care. You are not alone in the way you feel. Yes, writing about it has been therapeutic and has helped me process my marriage, my divorce, my childhood and what I want from life.