Planning a divorce

Let me start by saying i dont hate my wife... We just dont get along very well anymore. Been together 20 years. No emotional or physical intimacy for a long time. 10 years or so. Fights arguments a plenty. We are now roommates at best. She has her hobbies I have mine. I dont want a house anymore, im sick of it. Repairs, maintenance, lawn cutting im over it. Spent 3 hours fixing a dryer and barely got a thank you from my wife. She started a dog rescue a few years ago and we now have 5 dogs. it now takes up all her time.. i get done work come home no dinner but shes out picking up a dog or something related. Not that i cant make my own dinner but its something she used to do. I used to complain about the lack of sex in our marriage and i would get told well you went without it for a long time before me so whats the big deal?.. eventually i stopped asking.... so we had a big argument about the time she spends with the rescue. Also about how all of the donations are piling up in the garage and in the house making it cluttered. Im just tired of it all and depressed at this point. I want a companion and a wife. Not a roomate.