How a depressed person's deals with his life..!!!

Depression is something where I am fighting back but now gave up. I'm just fed up of fighting. No one understands my pain, the struggle of getting better, my feelings, my mental state. Please I request if you cannot support a person who is mentally depressed then please you have no right to speak something irrelevant.
If you cannot stay with that depressed person for life as per your promises taken that I'll there with you no matter what how I'll you are I'll still hold your hand then now what happened just because I'm not mentally stable and said you to leave me and you left, is this your love and promises you did to me??
I'm done fighting back with myself. I gave up. Just because I have few days left to live you left me. Yes, now I'm mentally depressed totally. And there's no point of coming back as I'm done fighting back with myself. Yes , I said you to leave me just because I wanted you to live without me. I am here only for some days. Once I'm gone, you can only see me in the sky somewhere between the stars..
Yes, I am in depression. I am depressed very much. And I think I do not deserved to be lived, neither I want to now, not because you are not there, but this pain makes me feels soo. Yes, I am dying from inside. Yes , I smile, pretends to be okay but I'm not...
I'm not...!!!