Chronic emptiness is definately something i can relate too. It sounds like you have a great family though and a wonderful relationship with your husband. Perhaps you could open up to them more about how you feel and hopefully you can all work together to reach some kind of plan of action? Im estranged from my family but maybe spending a long weekend with your daughters or planning a short break with your husband might help? I don't think theres an easy solution to this problem but trying to connect with your family on an even deeper level or just spending more time with them might really help. Its certainly better than self-isolating and becoming withdrawn from those who love you the most. Good luck.