weight loss...?

Kimberley-Ann
I'm an Australian size 10-12 (American 6-8) and feeling very self conscious. I'm 17 years old and I have a bit of stomach fat and weigh 55kg (120 pounds). My parents are saying I need to loose weight and I'm fat and I'm not happy with that.... Is that really overweight... Am I obese.... Any diet suggestions? Especially vegan diet as I try to eat little meat or animal product because of fat contents....