You say you miss who I used to be,
That I'm not who I once was.
That the world has completely changed,
And that it's my perception that's fuzzed.

And yet I see clearly for the first time,
My life is alive and clear.
You want me back at any and all costs,
At the cost of all I hold dear.

You ask me if I feel anything,
Happy, sad, or anything else at all,
It may not appear such as I watch you,
Even as your tears start to fall.

But I assure you I feel a lot,
I'm feeling intense pain, despair, I feel lost,
These emotions of negativity ruminate,
And I can only help but wonder, "at what cost?"

What cost indeed, as I shake and tremble here,
Wondering what will become of me, and where I go,
I'm stuck in a puzzle in my own mindscape,
And the lack of solutions makes my mood just sink so low.

So when this is all done, and I'm back to your normal,
I hope I will remember what it's like to not live in fear,
To not just persist, to do more than exist, and not just subsist,
What it's like to be happy again, and to see things ever so clear.

This is well-written. Referring to the last line, I also long for more happiness and a clear vision right now. This past month has been a whirlwind.