I am so sorry about how your family is making arguments, how the girl is answering very coldly, and how things are like at school. I’d best advise to maybe let go of the girl, I know it may be hard but letting go can do less damage than holding on at this point of the relationship. For your family, I’d advise you whenever they start to argue, keep your distance or distract yourself, like doing a favorite hobby such as drawing or reading, or just maybe going outside and taking a short walk to clear your mind up. I also advise at school, that don’t bottle up your emotions, talk to someone like the school counselor, form a healthy friend group if possible, or maybe walk away from the people who hurt you or just ignore or don’t respond. Once again, I am sorry for the things you’re dealing with and I hope it gets better.