I have a very close friend whoes more like my sis , she liked sumone but that fellow doesn't love her but she still wants his friendship . I told her to forget him and move on but all in vein and she is now blaming me for all her problms because I didn't stop her in the begning due to this our relationship is getting worst day by day... I have left with no options but to leave her... sumone please help... because I think that I'm failed as frind... and this guilt is killing me... :(

I'm assuming your friend is an adult and can make her own decisions. Don't feel guilty because you have done nothing wrong. My boyfriend taught me to stay out of the midst of people's problems and let them make their own decisions because in the end some will turn around and blame you. Always be there as a shoulder to lean on but remember this is her life and she will eventually make her own decisions. If you told her to jump off a bridge... would she do it?

Forget the guilt trip and let her think about it alone. She will either figure it out or lose a friend.