I can understand the hurt of caring for others more than they do you (this is coming from someone who’s mum does try her best to treat her children equally), but I think the answer is right there in your post; they don’t seem to have the same level of empathy as you do. It hurts to show your concern and have it thrown back in your face.
Grieving the relationships you wanted or thought you should have had will be hard, but you’ll come out stronger on the other side