Wow. The ending was very very good, dear.
But other than the last three or four stanzas [[where it said twice her years ]] I wasn't too fond of it. The flow just through me off, and I was kind of out of it, because of the poem.
I didn't want to continue reading.
Though, I'm glad I did becase.. the ending si amazing.

(:

-What kills her naive heart most
Is falling into his hands.
All the walls she had built up
Came crumbling down like sand.-
^This stanza is incredibly written

Rhyming seem forced and it is very typical. You could use some metaphors for better expressions of emotions. I like the topic pretty much but some parts and lines threw me off and don't make sense, leaving the reader unclear with what you tried to say. Like:
-And it made her stomach tense.- this description ruins whole context of the second stanza.
This isn't bad poem but it needs some changes and corrections.