A song I'm unable to sing

Too many emotions, but no suitable expressions
Why do I constantly let myself be controlled by your actions
Years of enlightenment, education and discussion
But when I'm before you, I still can't round my argument

With my eyes closed, I can paint your features
But I am never able to pin down your colors
You are a pulse beating continuously in me
But I can never grasp the rhythm of your heartbeat

You bring out the best version of me
But it is also you who cause my ugly side to show easily
I can never sleep without your soft breath brushing my face gently
But it is also in the cocoon of your warm embrace that I get bad dreams frequently

You are a song I'm unable to sing
Even though I can memorize every single lyric
Our colliding was too dazzling, my heart's drunken with enchantment
And I'm spellbound to drown in your boundless ocean