I always end up pushing people away

there is a certain point (it feels like a complete switch honestly) where I just need to be completely alone in my room. it usually always happens in arguments as well where if my sis is arguing with me in my room I just stop and force her to leave so I could be alone. It is like I can't process my thoughts with other people present and the only way to calm down is to be alone. or if im out with friends I end up longing for a quiet place to be alone.