作介词
If one thing is opposite another, it is on the other side of a space from it. 在…对面
例：Jennie had sat (opposite her介词短语作状语) at breakfast. 吃早餐时,珍妮已坐在她的对面.
作副词
Opposite is also an adverb. 在对面地
They sat (opposite副词作状语) at the table.
He lives (opposite) to me.应该属于第二种,to me 是另外一个没有关系的介词短语,与opposite并列,作状语.