A bit of advice for you, Karel. I know it's sad when you don't have any friends and no-one likes you but the way to overcome that is not to become even more actively unpleasant. If you tried to be a bit nicer to people, you might one day have a job, make friends, maybe even meet a girl - like normal people do. I know your mental problems make it difficult for you - what do you suffer from, some form of autism? - but don't give up on life completely because you're just going to be alone and miserable for the rest of your life that way.