Very disturbing...i hate em...plz help..i need to get rid of them ...my ex- best frenz!!!?

so basically it all started 2 years back when we all were rely rely nice to each oder...but w8 ...all of us knew we werent together forever...and none of us had any such interests either...we only needed support till the last day of school...we werent very strong in bonds...but i must admit we had fun and hanged around...made promises(fake ones and we knew it)...one year ped ..and we were now in 9th...we were still okay until i slowly found a change in my friends' attitude wid me...they sort of like ignored me...they pretended to forget me....and i am sadly a kind of a person who cannot in any case stand alone...i need friends...they neva called me or invited me to anhything...basically they acted like i didnt exist..evry1 around kept askling me if i had a fight...i swear i had several sleepless nights...my grades fell low and i visited the student advisor who later spoke to em...they joblessely started lieing bout me..they said i called them names and other random mean stuff like dis...but obviously i wasnt gonna shut up and proved them wrong and moved on...now im a 10th grader and i have rely rely rely gud frnds...we know each oder inside out ...i am very happy...but here arises the problem...one of ma ex-best friends started spreading rumours bout me...sending me bad msgs on fb...encouraging ppl to go against me and post vulgar comments about me ...i tried max not to care...i swear i didnt do anything wrong /...i didnt abuse her irrespective of her behaviour..plz temme wht to do...i am gonna go mad...