I love a girl named ajita . But now days I found her that she didn't take interest on me even though I like her very much,, and she also well understood that I likes her... but she did not take interest on me anymore might she found a new guy... my greatest problem is that I could not forget her, it distracts me from my studies,, I just wanted to forget her... please help me out in this matter

You forget her by keeping busy and being active.
Have you head the stickies at the top of the relationship page for good advice?

Stay busy and build a life outside of her

Time to get a life that you enjoy without her and be busy.

You may think about her a lot, but as you deal with the real world on a positive level, it will get better.