stuck with no way out.

Wife no longer loves me and has stated she hates me after 2 decades of marriage. She will not get a divorce because she doesn't want to effect our child, saying it will not happen until the child goes away to college in 8 years. Every day is miserable. Our child sees the issues we are having and is effected negatively. The child has never seen a healthy marriage, it has always been negative on one side. I try to make things right constantly, I dedicated my life to the marriage and our child, giving up all hobbies, a second job and all my friends. I have nothing to show for it, I am constantly walking on egg shells and there is no future for happiness. On days like today, I cannot even work I am so crippled by depression. I am ADHD and went to counselling with her and by myself, but it ended without any help. Our child is my everything, I am so happy to be around to see the child grow. If we do separate, I would not see the child as much as I do now which would destroy me. I am stuck with no way out.