My closest friend is not talking with me since January.I tried many times to talk to her but she doesn't want to talk to me. I had made a card for her but she just teared the card into four pieces. Now what should I do to become her fr

She really destroyed your card?? :O Well, sorry, but I don´t think she´s worth it.
If you still want to try it: Let another friend (a friend of you and her) innocently ask her what´s wrong (but he/she shouldn´t tell your best friend it was you who sent him/her) so this friend can tell you then and you can find a solution together.