Aww this is such a sweet poem! I really loved it... I thought it was about about a partner but then at the end you showed it was for an unborn child. The opening stanza captivated me.. I liked how you said you were passionately singing that song and trying to hit every note as if your life depended on it.. it was different.

The second stanza was really sweet and heartfelt <3

This was my favorite stanza:

Writing letters to give you
even if it takes years for you
to understand the meaning
behind each heartfelt sentence.

>> I love the idea of writing letters, and writing a future letters seems really sweet and a lovely gesture... I like how you pointed out it would take years to understand the meaning behind every sentence.
This also made me think of poetry, and how some people don't understand it.. so if you write a poem for someone who doesn't get poetry, it may not affect them or it could take time for them to really understand the meaning.

Great job with this poem, and it was a nice perspective.