You might also not eat as much as you think, ie 1 big meal a day is still not going to make u put on weight (usually)
Enjoy it, but realise that you are putting in place bad eating habits that you will find difficult to break when your metabolism slows (usually by 30) also you are not doing anything for your health by eating such huge amounts of fat and oil.
My brother is 6'2'' and 140lb, he eats unhealthily at times, and I have to tell him the same thing. 1 packet of chips all day is not good! Boys
He's 24 btw.