There are many children of divorced parents. Children are resilient. They manage divorce much better if the parents can get on well enough to parent together. For this reason, If you do decide to leave, do so on the best terms with your wife as possible. Don’t expect her to apologise to you, acknowledge that she has wronged you, or admit that she is in any way to blame for the break up. Make sure that she and your child are OK financially (as far as you are able). Concentrate your efforts on having regular contact with your child.