Welcome S!! I am glad you found us.
When my father was diagnosed with cancer he moved in with my family (Me, DH and two sons, one in high school and one in elementary school). He was going through a really tough time with his health and we all tried our best to make things better for him and he did an incredible job of not judging my family's norms (which diverged from the way I was raised by vast amounts). Every once in a while he would let something slip (dinner was too late, why were we playing with the kids instead of cooking....). The tension naturally invaded my marriage and my DH and I had arguments. Our house is small so there was no way that my father could not hear the arguments and of course he sided with me (how could he not?). When he completed his chemotherapy he moved into an apartment because he was regaining his strength. He wanted out so bad that he slept on the floor for the one night he had before his mattress and box springs were delivered. I felt horribly guilty and begged him to stay with us for one more night but he was adamant (and stubborn)and off he went.
He rented an apartment close to us and was still available for emergency babysitting and I stopped by often to check on him. It was the best thing he could have done for me and my DH. Our lives settled down and my father got a life of his own. He made friends, joined bridge clubs, enjoyed his life. We still had him over often, especially for holidays, and I would invite all my siblings from out of town in for holidays too. Anyway from then until the day he died he never slept at my house and that improved my relationship with him, my DH and my kids. It was years later that my eldest did things that made me hunt up this website!
Anyway good luck and remember that you deserve to enjoy your life. Start planning things that you enjoy doing to give yourself something to look forward to. Hugs!