I have never been in touch with anykind of this stuff, I know her from day 2 of my MBA college, we started our friends as normally one could ask for, but than we became good friends and I liked her very much and she too likes me.. we do all kind of blast, and we had many ups and downs in our friendship, I started feeling very badly about her... and at a point of time she too likes me very much, but now after 3 years, something blunder happened, blunder used to happen in past, but she always used to forgive me for all the reasons, she is angel in life, I cannot live without her, all I want is to see her happy in her life... she is broken, shattered all because of me... she feels that I am a moron and I don't understand her at all,, I LOVE HER VERY MUCH in this world... I don't know where it comes in her mind that since the day I came into her life, everything which is good to her is going away from her and one of her friend whom she treated as Teacher went away from her life because of me.. and I don't understand this thought, she has thrown me from her life and blaming me " I REGRET THE DAY I MET YOU"... I am broken, I cannot take this... I LOVE HER and I cannot see her in pain.. I don't know how to make her happy, as she doesnot want to her me ever in her life... and I cannot stay without her...

What is the blunder that happened?

Without more details, and less emotions, we can't tell what you need.

Sometimes, you need to be apart in order for the other person to realize whether they really want you or not. Give her space and see what happens...