Ah, yes! It's the "Stop the world, I wanna get off!" syndrome.
Very well said for when the intense feelings of pain, sorrow, fear, vulnerability stay too long. We wish we could turn it off until it is over, then turn it on when it has passed. You've written the cry in an unique way with very powerful words and intensity.
Whether on the shoal or on the shore, I'll seek the lighthouse evermore.
This is an interesting piece, and I enjoyed it. Again, your use of parenthesis inside the peice makes for a very effective voice.
The only thing I didn't like was the last line. I don't think "emotional suicide" is the correct metaphor to use. Your speaker doesn't want to kill himself--in fact, he doesn't want to kill off his emotions either--he just wants the pain to go away. I'd go with "emotional anesthesia". Or if you really want to stick with a death image, I'd change it to "emotional euthanasia"--mercy killing.
I believe the most important component of a poem is rhythm. Rhythm is the heartbeat of a poem. It is what makes poetry poetry.