D-Raff tread water in these tears

The joke is on me for not realizing
Till it was too late, the boat was capsizing
Gasping for breath I see you row off with him
And with my sinking heart I've still got to swim
I always thought love would bring out our best
As we sailed along together through the years
But now I can see that it's just a test
of how long I can tread water in these tears
When you bailed out, for me it was tragic,
That trick was like a reverse form of magic.
How can a broken heart continue to break?
How does it get more wrong once you've made the mistake?