Lyric discussion by Whatiam 

It doesnt really matter who feels more than the other, this song is about imbalance.

The key phrase is: "You give me miles and miles of mountains and I'll ask for the sea."

Mountains are not "better" than the see or "more difficult to cross" (think of all the people got lost because of the sea or its forces), they are just different.

In this case, two people met, got involved a little bit and figured out, that in this moment they just need different things. It's nobodys fault, it's just life.

Although I love the thought of life imitating art, I dont think they are referring to a significant age different being their initial challenge. There seem to be wounds that still hurt too much for them to be healed. Maybe these wounds are from past relationships. Maybe one of them or even both don't know what they want. And that's why nothing the other can offer - neither the mountains nor the sea - can ever be enough.

Much like the phrase: If you don't know what port you are sailing to, no wind is favorable.

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