"I hope she likes me," he said to himself.

said 是动词 say 的过去式，意思是"说"。 to 是介词，在这里表示方向或对象。 himself 是反身代词，由 him（他）和 -self（自己）组成，意思是"他自己"。 said to himself 这个短语表示"自言自语"，即一个人对自己说话。