I've watched so many video's on living and dying but cant understand why I'm so alone in this.

Why is it, i have a wife who cant live with me, two kids that dont want to even see me and family in law who dont want anything to do with me?
Im not bed ridden, have control over my bodily functions, in terms of toiletries; not depressed, not self distructive, im just in tremendous pain and very weak. Yet im left in the cottage at the bottom of the property, to live and fend for myself. (I get a plate of food at night brought to me, mostly because I cant cook) yet in every other way i have to take care of myself and deal with my prognosis on my own. I watch video's of so many people dying of one or another disease, have the help and support of there whole family and friends. Why then am i sitting hear so alone? I do as much as i can, im even trying to grow vegetables in a sun room, my home is clean and i have decorated it, to be a home of beauty and comfort. Yet im so alone, why, i dont understand. When they need something I'm always there to help (manly in advice and financially) when i need something, i get a bill with it. My wife's mother took care of her mom, incontinent and washed and cared for her until she passed away at 93. But my wife say she cant live with me, not even in a separate room, and im in no way demanding, re services, other then dinner, i make my own bed, in pain; i do everything in pain, alone, this is getting hard to write down, wanting to cry for myself, so although short I'm going to stop here. Sorry ill try again later, iamstephen