Hey yoz! My point of view for this photo is that the photo lacks impact. Really.
Firstly, the composition is fair, i would prefer the flower to go slightly on the left of the frame (rather to stay in the middle all the time), perhaps following something like the "rule of thirds" will help our eyes flow correspondingly in the photo, making the photo more impactful, giving stronger contrast and maybe adds some loneliness/isolation to it.
The middle of the flower is not in focus, i would personally suggest a slightly smaller aperture (greater f/no.), to make sure that the flower is totally in focus while the background remains blurred.
Secondly, colours. Not too bad, but this photo lacks contrast. No black or white points in the photo, so i suggest you deal something with the histogram. Also change the midtones of the photo for a better contrast. Saturation can also be increase slightly little more. (Do not over-saturate though.)
Bottom-line, good photo, well captured, but photo can be enhance a little more. May be good for home prints, but professional wise, still not there yet. working abit more on the compositions (where to position the flower in the photo) will definitely help a lot.
Cheers!