Is it possible to change your personality?

Hi Luke. Sounds to me like you are being hard on yourself. Everyone has positives about them, you just need to concentrate on those. My suggestion would be to learn to like yourself and those that don't like you, you're better off without. You say you're better at writing thugs down. Would you consider taking a creative writing class or course where you could meet similar people? If you're sill at school then you must be fairly young - and in my own experience I didn't really start to come out of my shell till my early twenties. You sound like a very nice guy and I wish you luck :)