|Well I think it's quite good. The imagery is really good all "show don't tell". You said you had trouble with the rhyming scheme being inconsistent but instead of trying to rewrite it, it might be easier to separate the poem into different stanzas for example:
No more you, no more us
There’s no more love
No fight, no trust
No more glimmers in the rain
No more thinking of the same
No more whispers in the dark
No more sweet and quick remarks
No more climbing through your window
No more listening to the wind blow
No more snowflakes in your hair
No more distances to bear.
Just my lone and gloomy self;
Now you’ve put me on a shelf.
Like a toy I’ll sit an wait
For the day, with blinding faith
When you’ll pick me up again,
Hold me close and fight the pain.
But I know deep in my heart
What we had was just like art;
It will never come again,
It will never be the same.
I will try in vain to paint you,
Find your beauty in her eyes.
But our luck doesn’t run twice;
You were my slow and sweet demise.
Also the second to last line might fare better not using a contraction because it has a different meter (pattern of stressed and non-stressed syllables):
But our luck does not run twice
But our luck doesn't run twice
(x is non-stressed / is stressed)
But those are two rather minor things and I think you did a great job especially with the imagery (as I mentioned earlier).