Yes, 65" is the diagonal measurement. The actual end to end measurement of the tv is 57.5 inches. The wall that it is hanging on is 7'4" wide. Thanks! That is Hank. He is a rescue that I have had since March.

18’ is a generous size, so have you thought about splitting the room into two areas: one end for t v viewing and the other for visiting around the fireplace. I searched for back to back sofas. There are lots of arrangements for you to look at, but this one caught my eye. You could put the fireplace between the two windows with a great piece of art above it. Maybe even cover that section with some interesting wallpaper. TV goes at the other wall in a built-in.

Creating 'flow' is all about coordination. That includes soft coverings (window coverings, pillows, floor coverings, etc). Your drapes are the beginning (and in this setting, the end) of the coordination effort. The two sofas in two different styles and two different colours create a hodge-podge sitting area. I would start with figuring out the style you wish to portray. Once you have that fixed, then figure out a colour scheme. After that, you will want to move ahead with the soft coverings. An area rug that compliments the drapes (you will want to get all three sets of drapes coordinated) will go a very long way. But first the big stuff: style. Either the orange modern sofa stays or it goes. Everything else appears to be traditional. The large brown sofa - being over stuffed - is in opposition to the orange sofa. It is 'over stuffed American kitsch'. You will need to choose between the two. That's where you start.

The only item that might be a problem is the kitchen island. You have a modern apartment, with fairly modern/eclectic bookcase and couch, but the kitchen island is a different style. If you have an overall eclectic style that would work, but otherwise it may need to be switched out for a more modern style.