OK , so it started a few days ago. We were like , talking , and talking and yeah you guessed it TALKING. And then suddenly my friend gave me the silent treatment. I didn't say anything negative or anything that will cause that . I was like , Good Morning! And my friend was like : " ." . Well in person my friend doesn't want to talk . Texting , my friend doesn't even text back! IM , no replies. What should I do? My friend is not busy , in fact my friend is the one looking for someone to talk to! And my friend doesn't want to talk to me...

If you haven't already asked, text her and say " hey,ive obviously noticed your ignoring me and to be honest i have no idea why, can you please tell me what i have done". Simple as that, if she doesn't reply then don't get in touch with her, its one thing being ignored by a friend when you know you done something wrong but she knows you completely clueless as to why she's ignoring you now and she's making you chase her, don't chase her, ask her outstraight and if she replies you's can sort it and if not then that's fine, you tried your best.

You may of said something unintentionally that upset her/him. I think the best option would be to talk to your friend and ask what you said to upset them so much.
Or perhaps they just want a little time for themselves or for other people. Just hang out with someone else in the meantime and they'll come back to you by themselves. If they don't then they probably weren't worth it anyway.

You have to know what's the problem first then you'll know what to do just don't give up trying after all she's/he's your friend