@Sparrow-Blue Its tough story. Since i dont know the other side's perspective i will assume one just to confirm to you if youre deluding yourself or not. When a person is in depression they don't realize all the good being done for them. A person in depression is very hard to please. Very hard to cheer up. If thats the case then instead of them working to show more love u need to show yourself some love.
On the other hand if your deductions are correct then you are probably in sorrowful state rather depression. In that case you again you need to love yourself and probably leave them.