"Once just friends,
How simple life was then,
A heap of smiles a bunch of laughs,
So many times just having a blast,"
Excellent rhyming here, and you really introduce this piece well, I am very intrigued. One suggesstion though:
I would add a comma between "smiles" and "a", just to have a better read.
"Our connection grew stronger,
Hearts came together,
What began as friends moved to friends with benefits,
Developed into far much more,
Took a chance on your past,
Believed you could change,"
What great emotions here just pouring out, I am loving this a lot, keep writing.
"Finally couldn't deny the way i felt,
Decided i had to be with you,
I'd fallen in love with you."
Very heartfelt and deep meaningful words. Just change the "i"s in this poem to capital "I"s.
"But just like the girls before me,
You took my heart tore it apart,"
an "and" should be added after "heart".
"So much for our connective sparks,
All you did is give me a broken heart,"
I love this wording, nice work.
"Our love could survive,
With every never again came another chance,
With every chance a piece of me got ripped to shreds,
Til one day there was nothing left."
Second line: add a comma after "again".
Third line: add a comma after "chance".
"I was empty, i was lost,
Broken beyond repair,
Looked to the light no longer did i see you there,"
Add "but" after "light". It reads better to me.
"With that i knew it was over,
Should of never gone this far,
For should of known better just to be friends,"
Third line: To me it sounds better if you put an "I" after "For", just my opinion though.
"Was each i love you a big lie,"
This is a question sentence so add a question mark.
"If only we remained just friends,
Maybe I'd still be happy,
Wouldn't be broken,"
Try adding "My heart" before "Wouldn't" just to say what might have not been broken.
"Wondering why you did this to me,
After all you put on the line to be with me,
Why would you risk losing everything,"
Last line: Maybe add a question mark, to me it should be placed there, but if you meant not to have one then that's fine.
"If i was only another game,
If we had of remained just friends,"
Second line: When I read this it didn't make sense, well just the "of". So delete the "of" and add "only" instead.
Overall, 4/5 from me. The emotions were strong and this was straight from the heart, but there were some grammar errors. Also, in some places you rhymed and other places you didn't. Take care, and keep writing!