Lonelyness... I hate it...

i know exactly how you feel man, been there done that. Look, none of this that happened is your fault, and even tho you make mistakes don't blame yourself for that,everybody makes mistakes. if you deny and/or ignore your flaws you're not getting better.i'll tell you what happens if you DONT talk to people about your issues and feelings, i was in your position too. Your a melting pot right now, and at some point your troubles will get so unbearable you will turn into a totally different person doing very VERY bad things. to prevent this from happening you have to :

-take a note or document in your smartphone everyday with things you have to work on and look on it every, stay focused on your goals!

-also make a taskboard at home with things you need to work on, eventually it will become an autamatism and it will make you better!

-buy a boxingball and start jogging/running in the park/streets : sitting behind your computer too much is BAD you will be come numb this way and it takes away your ambition to do stuff, it's also healthy and gets you more energy! a boxing ball is good to let off your negative emotions, blow off that steam!

-Talk to someone you trust! talking is the best, tell people to be completely honest with you and point out your flaws, it also prevents you thinking "nobody cares". if you wanna talk with me, add me on skype.

-steal that key and lock the gun cabinet, no matter how mad they get tell them you will give it back after things calmed down, tell them this is for their own good.

-ACT PROUD AND INDEPENDANT, when people see you love doing what your doing they will respect you more,when they see you try harder they will understand you more. it's a reversed psychology : the more you want something, the more you have to let go. besides, if people don't like you it's THEIR problem. what they say about you is bullshit? then THEY have a problem and YOU shouldn't bother at all. laugh at em and just say the 3 magical words out loud and proud while flippin the finger ; DEAL-WITH-IT, end of story."normal"
doesnt exist man, let em kiss your ass. be yourselfand start talking with all kinds of different people and most of all : apoligize to your parents.

follow my advice every single day,keep talking to people,stay close to your friendsand it will make you a better,happier person with an unbreakable self-asteem.as for the art part, when you feel bad and lonely you can't make art, it's an inspiration block. i've seen art worse than yours but because you're no artist does it mean you can't draw and enjoy art? bullshit mate!