Weight question please give opinion?

hello ladies and gents. im a 16 year old male who used to be heftily over weight. i was roughly 195 lbs. im now standing at 5'11 - 6' Ft tall and weighing in at 170 - 175 lbs. i have lost a considerable amount of weight and fat, but i need the opinion of you fit guys and gals out there. am i doing good weight wise and such? also, without going to a gym or workout tapes or whatever, how can i loose the most weight and fat possible in the next 7 1/2 - 8 weeks. please help and thank you