Hey there. I'm a 14 year old girl too. Neither of my parents act that way, but I can understand how you feel. That must be really embarrassing! You must feel as though he is treating you as if you are a young child. I think you should have a talk to him about it. Tell him that you are grown up and that you don't need him to put these many restraints on you anymore. Honestly, I think he likes the power or something, based on how controlling you paint him to be. But, maybe he's just doing this based on his own past experiences! Maybe one of his old friends as a kid was a crazy potato hoarder that made him eat moldy potatoes and run around naked! I don't know, and neither do you. So...try not to freak out at him and act like you are smarter than him. Don't flip out and yell, or else he will get mad and yell back. Just present your case in a calm and authoritative manner, and see how it goes. If it doesn't :)go right, then just make it a little joke with your friends, that you have a crazy Dad. My Dad is a bit strange too, so I just joke around with my friends a little bit before they see him for the first time. But don't worry. All will be well:)
Good luck though!