There are some parts of this poem that shined and then others that didn't.
"I picked it up
almost gently
wrapped it in a leaf
the ant was dead and
i was a murderess"
"She had bit me
I had killed her
what else is there to say?"
I feel like these two parts of the poem aren't needed. They don't give the reader and added information or enjoyment.
Your structure is thown off a bit during the middle and end. You started off with a 4 lines and a rhyming scheme and you made it clear to the reader that it was your intent, so when you start to mix it up it makes the poem sound like not all of your effort was put into it.
Submission Name: A requiem to an ant
