Husbands lost

I don’t think my husband wants to be alive anymore and it’s affecting his whole life. He’s always suffered from depression and had a really hard past few years with his mom passing from breast cancer after a 10yr battle and navigating life on his own with a new wife and babies. I understand completely but I think I’m having a hard time helping or finding some type of balance for him. He’s just started antidepressants which is something I never thought he’d be willing to do so that’s a great step if it ends up helping. I wish there was more I could do for him though. I also deal with my own mental issues and take medication on top of being more than halfway through pregnancy. I have to just put it all aside and take care of the house and our toddler regardless and it’s difficult. So I know it can be difficult for him too but I feel like he’s just lost at this point. He has no more will to really live and I feel like he’s dropped a lot of his responsibilities because of it. He’s really checked out and just a different person almost than how he used to be. I know people can change over time in a marriage but I’m worried for him. I know he’s unhappy and I don’t think there’s anything else I can do for him. I tried to just do it all and leave him out of parenting and housework but it’s taken a toll on me too. I need a partner who wants to live and get better. How do I encourage him to just keep fighting and push through it? I think just taking better care of myself and forcing me to get help and do what’s necessary really changed my perspective on life and made me appreciate it more. I want to live and experience all I can with my children and husband. I feel like we’ll never progress or enjoy it together though if my husband is left behind emotionally. What can I do for him?? I genuinely care so much for him and I’m sorry if I seem insensitive, I suppose I’m numb in my own ways to how I deal with things too. I want him to be happy and enjoy his life with the family weve created..