"I'm not good at compose" uh huh, sure. Then this either isn't your original work, or you somehow don't see what an amazing song this is - I'm betting on the second one though, as I wouldn't believe in the first one given what you've written in the long description.
Man, this is better than DJVI, Waterflame and F-777 put together (not to offend any of those, they are all great composers).
The only thing you could work on here is the bass. It is a bit annoying in some fragments of the song, just sounds a bit off, but otherwise it's almost a flawless work.
I very rarely give a 5/5, even when it comes to music made by professionals, so believe me when I'm saying that this right here is almost a masterpiece.
This is an instant scout, favourite, and follow. Nothing else to say. Still can't believe how you can say you're not good at composing after uploading this thing... jeez...
(Okay, I'm finished with trying to be harsh. This is srsly amazing work :D)