can you at least like yourself? we all have flaws and faults. you're 16 so you're also battling with hormones lol. but seriously you just said you're good at computers, there you go, that's something to like about yourself, you have a skill that is much wanted in this world. make a list of all the things you like about yourself and tell yourself that everyday ....don't think about your faults to much (i know its hard but dammit you gotta do that as to not have a reason to "hate" yourself
) and if there is absolutely NOTHING you can do, you might want to go talk to a psychologist or something they know more about this kind of stuff especially the thing without emotions