Not to sound like a dick
But I don't quite think this is a classical song. But just because it isn't doesn't mean it's not a nice song. I really loved the flow of it, and it had a nice balance between all the instruments. Good job with it.
I like how the guitar has the melody, and that the violins(?) are in the background along with the drums. It's a nice match, and it sounds really beautiful.
Now while it does sounds really nice, I think that it's a tad bit repetitive. I would have liked for you to mix it up a bit, maybe let the violins get some part of the melody or something. I do like that you add in something different later though at around :40. I have no idea what it is, but it adds to the relaxing mood that the song has.