A photo of the room would be helpful, are you able to post one?

Vikas, you need to stop typing, and pay attention to our advice! You need an architect. If it is a Western architect you're looking for, then search Houzz "Find Local Pros". Perhaps you could contact a Houzzer named Dytecture - here's his Houzz page: http://www.houzz.com/user/dytecture That is really all we can do to help you.

The best way to make a small space look larger is to avoid the tendency to add in too much furniture, or make it too large-scale. You need pieces that offer you enough seating, but with smaller profiles in both your living and dining space. Look for multi-functional pieces with storage, keep the wall color the same in areas that flow together, and use the walls for vertical storage and display instead of relying only on freestanding pieces. Look for furniture retailers that advertise "apartment size furniture," and see Houzz Photos under "small space living" and "vertical storage? for ideas. You can use art, an area rug or similar to decide your color scheme. Your apartment really isn't that small, fortunately, by big-city standards.

Rather than a pair of sofas, you could have one sofa with two matching chairs opposite, separated by a table with a lamp. Then you could float an open-framed chair facing the window. The cocktail table could be replaced with a grouping of bunching tables for a more modern look. How much more assistance do you require?