no one will confess you. You WONT get girls The reality is. to start a relationship, you need money, to be romantic, and to be handsome. sure. you might be handsome-er. but you have history. you have scars. and most importantly, you have no TIME to be romantic. you cant eat ice freaking cream. you cant go out yam cha. you cant drink. you wanna lose more weight. you wanna go lifting. you have no life. you are a freak for losing weight. fat guys will never get the girls so live with it.

Your bones will poke out your butt  Yes. this is annoying. being fat is awesome, cuz ur butt is gebu. sleeping on ur tummy, and sitting down, is always soft and selesa. but being thinner, bones start poking out your butt. its VERY unconfortable. Also, sleeping on your tummy is also not confortable. cuz ur ribs are poking out.

Your stamina will NOT increase, SPECIALLY RUNNING i will still pancit very quickly when running. i still cant run through a 5km mini marathon

You WONT run twice faster too.  Despite acceleration = force/mass, if your mass halves, you wont accelerate twice faster. for some reason, my 100m run only improved by half sec tops.
Your habits wont change I still love gaming. i love eating. and i love snacking. i love anime. and playing with my banana. These habits simply wont go away. It will be part of you. its just that you learn to offset it with exercise. The extra habit is: you will weigh yourself everyday. cuz u have been fat before.
yes. if you snore, you will STILL snore.
however all been said one thing for sure.

and if you can't run just walk lah

i realize i can walk more than 10 KM before kaput