I feel your pain. You are not alone. I am caring for my mother and her 3 other adult children aren’t even visiting, let alone helping! I don’t get how some people can be like this!

I am trying hard to find time for myself and to be me. Can you get yourself out of the house for the day and have some time doing something for yourself? Is there any charity or organisation you can speak to to offer some respite? 

Have you spoken to his children and told them how you feel? 
You could always speak to a doctor for yourself too. I don’t always believe that pills are the answer, but if you’ve exhausted all other avenues they may be able to help you with something to take the edge off.

Life is incredibly tough as it is and no one should have to go it alone like you are. 
I hope others on here may have some suggestions on charities or organisations that can help you. 

Hi will,I just read your post and do feel for you,Caring for your partner with no help ,can't be easy.  

I see you also say that your partner wont support you ,by saying something to his adult children ,I know you must see this as selfish ,but I have to be honest ,your partner probably feels if he says something it would cause a big rows ,and in all honesty, he probably couldn't deal with it ,going through what he is going through. On the other hand as well,maybe his adult children can't cope,maybe they are in denial, if there nit there to see it  it diesnt seem that.its happening to thier dad,yes they kniw it but not seeing it is easier to cope with.  

I know you are expressing anger and resentment to your partner for not taking your side,and to his adult children for not giving thier father the love and care he obviously needs at this difficult time. 

I kniw your anger and resentment is justified,but its really not helping you,its probably all you can think about,and ut must be eating you up  and draining you and zapping your energy,which isnt helping you, it will make you feel worse than you sllreafy do

 It seems your in a viscous circle...damned if you do say something ,dawned if you do. 

I don't know if this would help ,but what I would do is take myself into a quiet room in the house,with a pen and paper ,and id sit and write down how your feeling . Then id sit and read whst I had wrote. 

Then I would write a letter to my partner, saying something like you understand that it may be difficult fir him to talk to  his adult children  about asking them to come and visit  maybe help by giving a bit if thoer time,so that maybe one day/ eve you could just be able to go out,maybe meet up with a friend for a coffee, ,or go shopping  or see a film  etc. Try to express to him that you love him dearly,but that yiu do need a little bit of time out for yourself to revive your energy levels, so that you can continue to be there for him ,and hus needs,explain that you have your needs too. 

Im sure if its written down its easier to digest,he can read it on his own, it may be easier than you trying to say it all out loud, get stressed if you dont feel he's listnung . 

And maybe write a letter to his adult children ,something simular, starting with I kniw how difficult it must be for you knowing your father is going through having to deal with cancer .you can express yourself better sometimes writing things you want to say down. 

Its a really difficult situation for all.of.you ,ecspeacialy you,and your partner . 

Hope I haven't offended you with my suggestions, we all deal.with things differently, and its just a suggestion of how I think I'd try to.deal with things 

Hope this helps .its good sometimes to have people's oppinions even if it's not  how you want to deal with thigs. I just wish that your situation improves and you get the help  you need to make a bit of respite time for yourself.