I'm sorry that you have to do it all for yourself.
I had to too, when I lived alone.
Fending for yourself can be a big challenge, depending on the severity of a problem.
However, the issue can become much worse, if you are living with a person who claims to love you and happily sharers the good times, but sadly in difficult times are not willing to put in the same love and care that you do.
Yes of course you can do it for yourself whether alone or in a relationship, but how lovely is it when you get told, "rest up, I'll fetch you a hot water bottle, and see if that comforts you".... all said with a genuine smile and concern.
Your not begging for sympathy, you just would like to feel the same from your partner in life, as you give out.
Surely that shouldn't be an "effort"?
Even if I'm not so good myself, if I thought I could help anyone I loved, I would.
If I was in too much pain myself, they wouldn't expect me to, and we would somehow get through the troubles together....
I despair....
OP, you are NOT being unreasonable based on what you have said, and there's no other underlying issue that would stop your partner from being their usual thoughtful self, if that's the case.
Maybe you both need to chat on a different day, and discuss how you each feel about mutually helping.