She

[AttnAttack]

She

She was the reason
for my jealous ways.
She was the reason                      // Try swapping lines 2 and 4 to see if that changes the way this line is read, or if it changes how you feel.  Try it out. 
for my awestruck gaze.                   

In the end that all faded
Away.                               // this line is anemic.  Away is not a compelling enough word on its own unless you're trying to convey distance, in which case, pick a better word.
Far from anything
memorable.

Only separable.                         // Good use of white space here

Maybe it was just a first?
Until it became a Second,
Third,
Fourth.

Is it still considered pain
when hurt is everyday?                // 'like the one warm spark in the heart of an arctic crystal.”  - Herman Melville.  Look up this quote and you'll see what I mean.                                                                   Consider rewriting this in a creative way; theres a lot of wisdom here that can be said in other ways.

What draws the dagger line
of a staggered mind,
Never again the same
after                                           // Same as before.  After is too anemic to stand on its own.  you could remove this line: works well with white space.
the oxygen left my brain.

What I could have been.
What I should have been.
Excuses are all I'm left with
inside this scarred mind She left Me with.     //  Special emphasis on "She left Me" is enjoyed.  I almost think this is where your enjambments could have come in handy.  Up to you.