She's so self-involved that she only talks about her own problems and never cares about others.

self-involved 是由 self（自己）和 involved（参与的、卷入的）组成的复合形容词。self 表示"自我"，involved 来自动词 involve（使卷入、使参与），这里表示"专注于"。 self-involved 字面意思是"专注于自我的"，引申为"自我中心的"，形容一个人只关心自己的事情而忽视他人。