But there are some things that don't look quite right. I am by no means an all-knowing professional but maybe it helps.
The outside environment doesn't match with the perspective of the room and it would be much brighter outside. The window needs an actual window and it seems to be too high up. The textures on the carpet and the pillows look too big. The frame left to the bed doesn't seem to have a picture in it. The lamps seem to be on but they don't illuminate anything. And you could add a base board (do you call it that in english?). And maybe a little bit of dirt and dust would add a little more atmosphere to the image. Try adding some bump maps and some glossy reflections. Look at some reference pictures to "get" the look of things right. And try some colour correction in photoshop. Add a little depth of field, a vignette and some camera noise. Those little details add up at the end. It's those little imperfections that make a render more realistic.
I know it's hard to redo something for a finished picture, I don't like doing that myself. But maybe for your next interior rendering, work out the details, take your time with the picture and it will pay off at the end.