Caring for family comes naturally to anyone and we are programmed to do so when need occurs.  Attending family functions or socializing often with family is not the only way to calculate one’s family values.  Let them enjoy their lives 10 times, they will make sure they share yours at least once.  Besides, love is giving, not expecting.  They need to understand this from your giving up of things for them and sure they will get back to you the same way.