Stop being a lazy fuck and get off your ass. Try and exercise, just cause you're a scrawny, thin bastard doesn't mean that exercise won't help with that, and complaining about being a weak shit is fucking exceptional. Fix it, shitass.
Force yourself to eat better, you might be a picky bitch but eating ramen and chicken nuggets is horrendous for your health even if you won't get fat from it. Eat more meat and veggies or whatever cause while that stuff tastes like garbage to your defective taste buds, you need to eat something better than actual garbage. You'll love olives and pepperoncinis so try those instead of junk food.
Stop comparing yourself to other people, You might not be the best or the smartest, you might not understand things and be stuck out of the loop often, but you're self-aware of your faults, and honestly that's one of the best things to be cause you can learn from your mistakes. Do so.
Most importantly, try to help your friend more. Maybe, if you start soon enough, you can stop him from making decisions he'll likely regret. If he still decides to become trans, immediately throw all your feelings towards him in the dumpster and throw said dumpster into the sun. He has a girlfriend so do it regardless, but do it even harder if he becomes trans.
Also stop jerking off so much you damn coomer, go onto this site called Kiwifarms instead. That, and play Dragalia Lost sooner, it's somehow not completely terrible despite being a gacha and you'll have the storage space for it if you stop being a horny fuck