Thank you for your thoughts hamster.
I have pretty much been pampering myself since that time..yes I agree I haven't got him out of depression single handedly. I took the help of his friends and my mom too..and we worked through it patiently and he was perfectly fine with me while he was here. After returning there, he resumed to his routine life which was not proper since dec 2012 due to certain problems but now he is back on track since a month..he interacts with his friends alot more now..and I hear lots of chatter and laughter around him..which I am truly happy about because obviously I used to hate to see him depressed. He has a really lovable and jolly personality and he being low wasn't good at all. He taught me to face problems with a smile and because of him I am as strong as I am now.

I know things don't rapidly change..everything has a time period but I just wish we would talk the way we used to before.. and I want all those old times back.