Losing track

I feel like the speaker is trapped by herself.
That she is alone in the ocean. To me the whole ocean felt like it was her world.
The world with the tides, how it is unbalanced, how it has up and downs.
How life will sometimes make you feel like the waves are trying to take over you and knock you down.
But you have to fight aganist the tides if you dont want to be lonely.
I get the sense that she is alone now and she is trying to fight through it because no one ever wants the feeling of being alone.