That phrase has too much meaning to just throw "meant to be" in the song call it done. I wanted to give some visual imagery that would describe what "meant to be" feels and looks like. And the chorus needed to fit the verses. Since the couple enjoys being around the ocean, I used water/ocean imagery/metaphor once again for the chorus (already used in a verse).
Here's the chorus:
You know when you have what you want
When you’ve been filled to the brim
When the current tugs and you can’t resist
There’s only one way you can swim
These lyrics compare the tug of falling in love with the massive power of the ocean. This couple had years apart, but the current "brought him home" eventually. They are as "meant to be" as the direction of the currents in the ocean. The first two lines describe the full and content feeling you get when you are in a good loving relationship.
A possible name for the song might be, One Way You Can Swim. Now comes my favorite part, adding music.