Fruquently changes​ in nature and anger.

Now a days My friend  always shouting on her parents. And she always tells I am mentally sick. Don't talk to me. her anger gets more  dagerous than previous behavior.she always tells I will commit a sucide.i think she wants a life partner for marriage because all of her friends got married. she is a introbird person by childhood. But in that time she always carry negative talks and then shouts on it. No doubt she is a brilliant by mind that's why she have a secure govt job. Her salary is also enough for her. But she feels lonely while she lives with her parents and brother. She never  tells about   her inner thoughts and wishes. But she lives with frustration no matters how tiny is the reason. So I want to know that should we consult with psychiatrist? But she doing her job in best way.