I will tell him the book is my devoted friend.

我会告诉他书才是我最忠实的朋友。

Little Hans had many friends, but the most devoted friend was big Hugh the Miller.

小汉斯有很多朋友, 但是最忠实的朋友要算磨坊主.

I believe that you are devoted friend, and not a fair weather friend.

我相信你是我真诚的朋友, 而不是酒肉朋友.