Most Helpful Girl
If you are certain the only recourse you have left in your marriage is to leave, then do so as respectfully as you can. Sneaking out without telling her you are leaving is cowardly. You can't possibly think If you tell her as you walk out of the door there will not be "arguments and drama".
Let her know you are leaving and tell her why. If you have a friend or relative you can stay with until you find a place to live I would recommend doing so. Life is already tense in the house and once she knows you are serious about leaving, it is going to get worse.
Once she knows and you have found a place to go. I'd try making the physical departure at a time when she is not home. But call her to let her know that you have left the home after you have your belongings (and I don't mean everything in the house). About that... be respectful. Do not take furnishings and housewares. Leave the marriage residence intact. Take YOUR belongings. Don't be petty about what you take from the house. You can buy your own towels, dishes, etc.
There is bound to be a bit of drama no matter what you do. But you can minimize it.1