I am dealing with a similar situation at the moment, due to chronic ill health.
Part of the problem is I look so well and don't look ill.
Some of my friends just don't get it and think I'm exagerrating the extent of my ill health.
It is making me really sad and has been on my mind a lot.
I have realised that they are not true friends, especially my sister in law, whom DH and I supported way and above, during her husband's chronic illnesses. I haven't seen her since November yet, she lives just around the corner. So many empty promises.
I have learned to accept it.
However, I have to say , on a positive note, that there have been a few Gransnetters, who have been so supportive and held my hand on a number of occasions.
I'm not looking for sympathy, please don't think that.