Time Can Never Kill the True Heart Lyrics

Lyric discussion by Uling 

Cover art for Time Can Never Kill the True Heart lyrics by Stars

This seems like a divorce t ome. "One life: me and you" I interpreted that as the marriage binding them together. But all along the girl has always loved the guy more "you won't say love but I might", and finally it's ending. "..you muttered 'we're through"

What's the actual "sea wall" referring to?