I don't want you to feel bad about it.
Discrimination: The gap between 3.2 meters and 3.5 meters is only 30 centimeters, less than one foot.
You can put a pot of green plants next to the sofa and buy a flower stand with similar color and matching sofa.
That's settled.
Or buy some small rounded corners and put them in this spare place. Put some fruits and knickknacks in the corner. Very comfortable!
I hope I can help you!
Good luck to the Year of the Loong!