I'm not very good at arguing this point, but I'll try again with your poem:
For me, this poem says too much. The reader gets the emotion straight from the story, but that takes away from the general reaction of the reader. It could be more arbitrary, or open to interpretation; and sometimes when you paint everything in black and white it takes the poem into one specific direction, negating subjective interpretation.
Know what I mean?
I get this overwhelming theme of not being able to let go of something...or more specific, someone.
And then when you find someone else you can only hope that you truly care for them instead of trying to fill this void. But it's not really a void, it's quite the opposite. It's a lack of space, that needs to be cleared. Love the irony. And I love what you did with the last stanza.