What to do if one moment he says me to stay away, next moment asks why I was not sweet?

Anonymous
he has some health problems now and he feels bad almost all the time.I try to help him as much as I can but it seems that it is never enough!

He feels emotionally destroyed now and he is really difficult to be with ...One moment he tells me that I must stay away from him, I must stop worrying about him because it is only his problem...But I still do everything I can to make him feel better!But next moment he suddenly asks why I was not very sweet and nice with him...

how can I deal with this?he doesn't know what he wants and the result is that I feel destroyed , doing everything wrong etc...
What to do if one moment he says me to stay away, next moment asks why I was not sweet?
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