I know it's painful to feel estranged from family, but it is really hard for them to watch you slowly fading away and locking yourself away from the world. They know they can't help you until you help yourself and it's too painful for them to watch you deteriorate.
They would most likely be more than willing to have some sort of relationship with a healthier happier person.
You can be that person. Make one phone call today. Call emergency services and have someone come to your house. Don't worry about how you look or how your apartment looks. You need help, but YOU have to start this ball rolling.
Call 911, they will help. Many hugs. Get on this! You can do it.