You will get much more help I'd you can post a scale drawing with all the dimentions on it. I can't keep that much detail in my head, let alone manipulate it to suggest changes, and I'd bet I'm not alone.

I assume the double doors are the entrance from the bedroom?

In general, I would want to add the space to the closet, as it is relatively smaller than the bathroom, but i don't care too much for a configuration that you walk through the closet to get to the bathroom.

Can you add the current bathroom layout to your sketch? That will give us an idea of what could be rearranged to accommodate a potential vanity inside the space.

What else do you want to change about your current layout? What are your goals?