Your happiness is very important. Life’s far too short to live it in an unhappy marriage. Why sacrifice happiness for your child’s sake when your child would then be witness to a dysfunctional and unhealthy relationship dynamic. When a child is exposed to a toxic situation they grow up with a very skewed version of what a relationship involves. You would be doing your child no favors by staying. If you leave, you give yourself a chance at happiness and you also give your child a chance at seeing what a healthy relationship looks like, when you find a healthier one to commit to. So it’s a win win. Yes, it breaks up the family but for a Much more positive outcome in the end. Please know that your happiness matters. Wishing you all the best.