Hi I am Charmaine, I'm from Australia

I am 17 (18 in May) and a tiny
152 cm short, I currently weight 57
kilos (sorry I don't do
pounds) and I am terrified of hitting 60
kilos. I am only 10
kilos (approximately 20
pounds) overweight, but I'm not going to let it get any harder then it's going to be. I feel really discouraged because I feel like it's going to take months and months and years.
I would really like to have a
Buddy that I can relate to, to help motivate or support eachother, preferably a female around the same age.
It would really and I mean
really help if somebody could tell me approximately how long it would take for me to lose this weight according to my age etc. I have already cut down to 1200
calories which is the simple part and try to drink lots of water.
The reason I put on weight in the first place is because I had been eating a lot of take away, and a few years back I tried to put on weight because I was wearing childrens sized clothing (being so little, not to mention 42
kilos) and found it really hard to find nice clothes, but I guess I got addicted to eating fast food (coz it tastes so goood) and I lost control of it.
So now I wish that i was still 42
kilos and wearing kids clothes than 57
kilos and hating my
body.
I would like to lose this weight in a couple of months how much exercise do I need?
Charmine
xx