When you are mine

[cosmic glade]

To your words, my heartbeat replies.
Wherever I go, your shadow follows.

This is incredibly annoying as it doesn't establish a pattern, and people love to notice patters, and since you have shown that you're going to be adding patterns people are going to expect that.

The 3 lines before those 2 were devoid of one, so to keep the reader pleased reward them for that small bit

For that third section, it would've been better if the rhyme scheme was AABB rather than ABAB.

Everything else is fine

[sage meadow]

Thanks for your words

I'll make sure to change them

[cosmic glade]

The birds long to linger by your window’s side,
To hear your soothing voice as they quietly abide.

Here, 'abide' sounds too similar to 'side', even though it does what it wants to do, it makes it sound repetitive.

[sage meadow]

I'll send the change here and let me know if it fits

[sage meadow]

Ya thought of it too

@cosmic glade
Is this change okay?

Wherever I go, your shadow still follows.
In your comforting lap, my restless soul mellows.
To your words, my heartbeat softly replies.
My whole life held captive by your eyes.

Or should I write new lines?

[cosmic glade]

Yeah that's good