Is it okay to just get away?

I'm 34. Married. 3 sons. Don't drink. Don't smoke. Don't game. Have more or less left every hobby behind me. I work, spend time with my kids, take care of our little farm, eat and sleep. But my marriage is failing, literally on a knife's edge from being over. I'm forgetful. Always forgetting something that ends up triggering my wife. Head in the clouds so to speak. The weight of improving to be enough to save our marriage feels like more than I even want to attempt. Metaphorically, I almost feel like setting a match to the whole thing and just... As I said to a friend of mine a few weeks ago: "Let the hermitage begin". I know that's not responsible. Not the right thing to do for my boys or my wife. But I'm tired. My gut says to just take my canoe that hasnt touched water in years, drop it in the river and just be gone for a weekend. Maybe a week. No phone. No outside contact. Just time to decompress. And think. Not be constantly bombarded with problems. Just fish. Paddle. Listen. Think. Sleep. Repeat. Idk. It feels selfish. But man I need a break. I'm drowning here.

2 years ago, my little brother was killed in a car accident. A year and a half ago we found mold in our home and insurance wouldn't cover it. So we sank our small business to afford the repairs. A little over a year ago, the nearly repaired house caught fire. Took 6 months til we were able to move back in. Lost my dog to a car. It's just one thing after another. My health has gone to shit from the constant living out of a suitcase and gas station or microwave meals, I've lost any drive to improve myself. I'm rambling now. I'm tired. Any advice would greatly be appreciated.