Your brown eyes sparkle like chestnuts,
Smile, and your teeth are twinkling stars.
Blushing red like blood from fresh cuts
When I see you, or wilting roses in a vase."

^^Ahhhh...I frikken adore this opening stanza, the imagery is beautiful, just beautiful, it creates vivid pictures in my mind while the flow is flawless and pulls me into the piece. I don't think you need the fillers though, they work without them, maybe:

Brown eyes sparkle like chestnuts,
Smile, your teeth are twinkling stars.
Blushing red like blood from fresh cuts
When I see you, or wilting roses in a vase.

"Your voice is a beautiful harmony,
Bronze hair soft velvet.
This handsome young man means so much to me,
You are someone I will never forget."

^^I found the flow to be slightly of on the last line, maybe change I will, to I'll?

"Your personality is like a flower:
Open, delicate and gentle.
Around you, you hold all the power.
A part of my life, you are essential."

^^I really like the similies you're using to describe him, it adds so much meaning to the poem, and beautiful rhyming here.

"When you walk past, my heart utters a sigh:
You will never be my special guy. "

^^I liked these lines, but I felt they were a little weaker than the rest of the piece which was strong throughout..maybe add some more?

To say this was the first poem you wrote, I think you did a remarkable job.