What should I do about this?

Эй, snap I'm a vegetarian too ^-^
I decided to become vegetarian at around 9 years old. Luckily my parents were fine with it amd respected my opinions, and gave me meat substitutes instead, like quorn, nuts, vegetarian sausages, burgers, chicken etc..

As for your situation, its quite difficult because Ты say Ты can't get your own food. I totally understand that your dad isn't being helpful, so you'll have to sit down with him and the rest of the family where possible and talk it over, because he probably thinks its just a phase.
Try not to be too rebellious and don't say 'refuse' and 'you cant force me' and so on, be really calm and super nice and explain that either way Ты are not going to eat meat, because Ты don't like it and Ты would feel much better and еще relieved if they could respect that.
don't forget to big it up and say how stressed it is making you, and Ты could even throw in the fact that Ты had to ask for help on the internet, this will really hit Главная with your parents and hopefully persuade them that Ты are serious that Ты don't want to eat meat, and Ты need their help to get the right nutritions.

Ты will probably have to compromise, like maybe eating рыба или saying 'maybe on день i will consider eating meat again' even if Ты have no intention of that. either way, Ты will have to think carefully about this whole thing. Ты could talk to a trusted teacher about it at school, или go onto the internet and research help for beginner vegetarians.

Hope Ты do ok hun, keep me Опубликовано how Ты get on and let me know if Ты need any еще Совет ^-^ x
Lottey x

Just don't eat the meat. *sigh* sorry I'm not helpful, but I'm not a Фан of vegetarians, especially the ones who don't eat meat because Животные are harmed, and no I'm not some cruel heartless person, it's just PETA people never even bother to actually know what's going on, for instance if deer aren't hunted they overpopulate and die of diseases and starvation, who wants to let some poor animal starve to death because there's too much competition for food?

Well, see if Ты can have a formal talk with him, tell him why Ты don't want meat and ask nicely for him to get Ты Еда without meat.
My parents have always been supportive so this is only sort of a guess.