I like the way the flower looks, and personally, the glass isn't bothering me at all.
I have two very small nits with the photo:
I didn't see it right away, but after staring at the picture for a few seconds, it registered that the glass is slightly shifted right and also appears to be slightly tilted to the right. I'm not sure if this was a creative decision, but the subtlety of it makes it seem unintentional.
I'm guessing you manually darkened the background, which is totally fine, but there are visible, tell-tale photoshop "brush strokes", which are a bit distracting. Maybe rev up the burn tool and go over it again? (side note: I'm viewing on a crappy laptop monitor)