Hi ke,
Sounds quite a sad situation for you. Do you have lots of support around you at this time? Have you told him how you feel and what you want to happen? Has he really talked to you about why he’s feeling depressed? Sounds like he needs to take control of it and help himself be happy before anything else. It’s sad for you that he needs time alone but only he can decide what is best for himself. Perhaps you need to look after yourself too, being supportive to someone with depression can be very hard, what do you need in order to feel happy? He in time may realise what he wants from life but its got to be in his own time, it’s up to you to decide what’s right for you too and if you are prepared to step back and give space or move on and consentrate on yourself, neither being wrong to do.
Hope this helps in a small way…. I’ve never replied to a post before so do forgive my words if they don’t help, after all it’s just my opinion on your post
Take care
Sophie