Something wrong with me or am I just lucky

Hey there, so I've been playing this game called World of Warcraft for the past 4 years now and ever since then I have become very lazy. Ever since I started playing I have not really been eating healthy. I usually just snack alot and eat junkfood such as chips, cookies, TV dinners, gatorade, soda, etc. I'd say for the past 2 years I've done nothing but get up and head straight to my PC and start playing (independent study) I don't work out, exercise, anything. The thing is, I have not really gained much weight at all (maybe 5 pounds) which I find very odd. So, am I just very lucky or is there something that might be wrong with me?

I doubt theres anything wrong with you, maybe your body just burns off calories quicker than others. I would say thats pretty lucky indeed. But I would suggest doing so cardio because that junk food might wear on your heart later