HELP!! NEED MY REPUTATION BAK?

Ok so it started a week ago this girl named alyssa talked to me n then 2 days after that i met this girl named nikka which is alyssas best friend then we figured out we started likin each other... n then alyssa starts telling lies to nikka that are about me because she is jealous ....so now we hate each other... so today at school a whole bunch of girls came up to me n my friends n started laughing at me(they were popular girls)...n then alyssa starts saying i like this girl named jazlyn(which is not true) so they started spreading a bad rumor about me in the whole entire school n now im bein laughed at every single time....im embarred n i just want my life to be back to normal god alyssa is a ******