Pictures of the whole room would be helpful to give advice. Why can't you center couch? The end table looks jammed in the corner.

White light-weight curtains.

Art to the right of the windows.

White curtains hung almost all the way to the right corner, as if there’s another window there. Nobody will know it’s just wall back there.

And pull the couch out a bit.

It would allow your furniure some breathing room if you could move the sectional to the left just a bit. I would select a pattern for the drapery panels. Your from could use more texture.

will patern drapes go with my rug which is like this abstract blue gray splash paten

Too many patterns in the room, the eyes need a rest.

Patterns will work if they are controlled like stripes or small all over patterns. The large black sectional and plain walls could use some texture as contrast

You could potentially do patterned drapes. It would just depend on what else is in your space color wise and design wise. Here are some ideas from a few recent designs of ours:

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