Family has issue with me.

My family always is giving me a hard time. I wish they would just understand. We all get together every Sunday for a family hang out. I do not do well with crowds. Wether I know them or not they just freak me out. I tend to separate myself from them eventually. I like to just go off by myself and be alone. The group ends up getting loud and crazy and it makes me mini panic. They are always giving me grief for going off and being alone. It really irritates me.