I would just let him be.
let him give it up. safe yourself from even more heartbreak of trying when you know he doesn’t want to.
i only say this because i’ve been through this. i tried and tried to fix things and tried to get him to do counseling to no avail. if his heart isn’t in it anymore and he’s telling you he doesn’t want to try then that’s just something that isn’t fixable.
Im currently in a marriage with a narcissist and im also looking for a way out I got 2 kids but my kids who he helped me raise my main worry right now is how to start over we’ve been married for 4 years and I ask my brother his advice was”I understand where you are coming from and, as a man, I know that I am different from you emotionally and mentally. If I were in your position, the first question I would ask myself is what morals and values do I hold important to myself? This would give me a foundation for my life. The second question I would ask myself is how can I apply those morals and values to give myself confidence, self-respect, and address any self-esteem issues that may arise.” I just wanted to share hope that helps
Check into marriage helper videos on YouTube. Work on yourself physically and mentally. Become the best version of yourself. You have 0 control over someone else or someone else’s actions.