✔ 最佳答案
you can spend more time with your family, if you wish.
it's good that you have friends. see if they have got any good advice to give you.
you can try to explain your mum that you want to stay in your room and playing guitar feels good.
you mentioned you are aggregated very easily by your brother, that's bad. I don't think there's anything you can do about it. you can try changing your thoughts by putting your mind into something else, say playing the guitar. that'll make u feel better. being alone is just normal, sometimes being alone isn't that bad, you just have to figure it out sooner or later.