I don't have any personal experience with this. But here are links to a bunch of articles, from PsychCentral's archives, that may be of help:

https://psychcentral.com/lib/how-can...hos-depressed/

https://psychcentral.com/blog/6-thin...hos-depressed/

https://psychcentral.com/lib/15-ways...illness/?all=1

https://psychcentral.com/blog/how-to...ression/?all=1

https://blogs.psychcentral.com/thera...o-get-over-it/

https://psychcentral.com/blog/9-ways...th-depression/

https://psychcentral.com/blog/10-thi...sed-loved-one/

https://psychcentral.com/blog/5-ways...-relationship/

https://psychcentral.com/blog/how-to...-a-tough-time/

https://psychcentral.com/lib/the-cha...onships/?all=1

I wish you well...