When you say you can see straight in from anywhere, does that mean there is only a railing to your bedroom? Do you have a door that you can shut?

Anyway....here is some inspiration

Some inspiration:

House on a Marsh · More Info

Leaside Master Bedroom · More Info

You probably can't center it under that other window without the door interfering, but is there room to place it on that wall and still access each side of the bed and open the door without it hitting the bed? You can tape it out with painter's tape to see instead of moving the bed, if that's too difficult.

If that would work, then you can use draperies to fool the eye into thinking the bed is centered on a larger window, by covering part of the wall to the right with drapes and not exposing the right edge of the window.

Like this:

Or you could leave the bed where it is and just change the swing of the door, so it opens the other way - it will then block the view into the room when it's partially open. If you're not handy, it would probably take a good handyman only a couple of hours to switch it and would be worth it!