Has anyone come back from the brink?

I no longer feel I love my ADHD husband, not for about 6 months now. I feel terribly guilty about it because I know he's now trying to make changes (after telling him I want a separation) but it feels too late for me. He's no longer aggressive, but he is still very defensive and irresponsible and I struggle to find any positivity in our relationship to look back on. 

Has anyone felt this way and made a recovery? I feel so ambivalent about working on my marriage and running as far away as possible.