"I feel like it's just me, I feel so alone,
I'm enclosed in this glass heart-shaped box,
Looking at the mirror, staring at my clone,
That holds my head in headlocks."
-- This stanza is a great way to open up the poem. I like it because it states right away how the person is feeling - alone. Also, I love the rhyming, and it flowed very well.
"I'm stranded, lost-with no where to go,
No one to see and have a conversation with,
My heart beat sounds just so hollow,
Being repaired is just a made up myth."
-- I like this, as well. Though, I think maybe in the third line, you should switch "sounds" and "just" so it reads.. "..just sounds so hollow..". Just an opinion, of course. :]
"It'll stay the same, it won't get any better,
I'll be this negative person waiting to break;
To break free and live happily ever after,
I'm with you, this life, let's partake."
-- Ooh. I really enjoyed this. I feel as though the emotions are completely real. I also really like your word choice throughout the piece. It's excellent.