Can I really leave my life? Should I?

Hi everyone I am new here but have been lurking for a few months, hopefully I am posting in the right section. My husband and I met in college and we have been together for twenty five years. We were always very close and basically did everything together and it felt like we had a lot in common. Now it feels like we have nothing in common. I guess through the years I have come to realize that we are very different people, I am an optimist, he is a pessimist, I am neat, he is messy...you get the picture. So a couple of years ago we started arguing all the time. I just felt annoyed by him constantly. Then this year we really ramped up the arguing. We probably couldn't go three days without a disagreement. Then recently, for the first time, I began to feel emotionally checked out. I'm not complaining to him anymore, barely even talk to him. I am drained and just don't have the energy for this anymore. For the first time I am actually thinking about what it would like to be without him, something I never thought I would contemplate. From the outside looking in I suppose our life looks pretty good. In some ways it has been too easy for me. I am very embarassed to say that I went from my parents taking care of me to my husband taking care of me. I worked the first few years we were married but now I haven't worked in a very long time. I am a volunteer with cancer patients at the hospital my husband works at, that is the closest thing to a "job" I have, I suppose. Pretty much I feel unemployable. I grew up in a family that criticized often and rarely praised. I guess that was one of the reasons I fell in love with my husband, he was the opposite. Even now, he tells me how beautiful I am and how much he loves me, and he has said that to me every day since, well forever. I have no doubt that he truly loves me with all his heart. And that makes me feel happy and secure. What I am wondering is, can i really turn my back on this life, a life that has security and a husband that treasures me but has not brought me much happiness? Am I just being an idiot to even think about leaving it? Thanks for reading this (I hope it made sense) and I appreciate any input you may have.

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