I`m sorry to hear you going through this. I`m far from experienced in this area, but I did spend a lot of time with people who used to suffer from eating disorders and I`ve seen how hard it is to deal with. Thats also my advice really. Seek contact with other people dealing with this. Things like support groups, maybe online contact via mail, etc. It can really help talking to someone who has went through the same thing.
Don`t give up on your parents or other family to soon. They might understand or sympathize more then you think. Their annoyance might just as easily be pure concern over your wellbeing. Its important to keep communication open with those who care for you. When I think back to how people at my workplace dealt with it, they also had to force themselves to eat, but did so by making it a less big transition. As in still eating, but not as much as you would normally, or maybe something more tasty. They would compensate it by eating slightly more often a day. Find a way that works for you. Invite family or a friend and eat out for example if that helps for you.
I saw people go through hell because they couldnt get themselves to eat. Its hard to understand for an outsider like me, but do know that I hope you find a way to bounce back. Sometimes a person has to break through their own barriers to keep up the fight. Just don`t forget that even when you have to do it yourself in the end, there are always possibilities to find support. Since I dont know where you live, i can`t recommend a place to go, but in Holland I would know the perfect place for you.Im sure these places also can be found abroad.