(((((Ankit))))))))
So sorry for your loss and so sorry you have to be here, but you have found a great group of people here who truly do understand what you are going through.
I lost my soul-mate June 15 2011 immediately after what was supposed to be a routine operation. Like you, she was my everything...best friend, soul-mate, wife, everything, and like you I will never be able to describe the feeling of missing her and this feeling of why bother.
I couldn't eat right and sleep right for weeks, and I actually lost more than 20 pounds at the beginning. I even called in to work being so tired from so little sleep. Luckily my boss was very understanding and supportive.
This will probably be the hardest thing you will ever do. I know it is for me.
The best advice I've received here is to take it one moment, day at a time. Just do what you can with what you have and know, and don't think you have to do it all right now.
Friends and family mean well with their advice, but no one will really understand unless they go through this too. I was one of those who didn't know what to say, and I still don't, and I really didn't understand it at all until it happened to me.
((((((((((((Ankit))))))))))))))