I am 19, and for 3 years now I have stayed the same. 6'1'', 145lbs. No matter how much or how little I eat, my weight NEVER changes. I've tried stuffing myself full at each meal, and nothing happens. I have even tried eating nothing but junk food, and I still don't gain weight. The thought of eating pure blubber has crossed my mind, but I know even that would do nothing. This friggin' sucks. I tried working out to see if that would help me build muscle that would stay on me, but that made it even worse. I ended up being hungry ALL THE TIME and couldn't keep up with myself, and even lost a couple pounds. WTF am I doing wrong, or is it all the fault of my metabolism?