Lyric discussion by Wanderreis 

Cover art for Along Came Mary lyrics by Roger Hodgson

In addition to the love sense, the song is a reference to LSD:

"Come away, come away with me Far away where the eyes can't see Come away to another time Pardon me if you lose your mind"

The verse "Pardon me if you lose your mind" is alluding to a bad trip, as happened in the case of Syd Barret.