How to get my mate to understand that dealing with my family is a burden?

Since they took the COVID 19 shots they have been sick and I have been dealing with them for 4 years sick and serious health issues. It has taken a toll on me mental and emotional due to their health decline - right now dealing with a family loss and another w sister who took sick a month ago. I have a lot going on with my children and tending to them. I tried explaining to my mate that I can't deal with my family and am tired of dealing with them as they put this burden on me with their constant stress.
How to get my mate to understand that dealing with my family is a burden?
Post Opinion