Tell your friends you didn't say those things and you don't know why people would make stuff up. If they're really your friends, they will trust and believe you. I had this happen to me a few years ago, and some of my friends believed the rumours about me and some didn't and it caused the whole group of us to drift apart. Eventually a year later, the guy who started the rumors was drunk one night and admitted to lying and lost all his friends, and some of those old friends of mine apologized to me, some didn't but 'felt bad'. It's not a fun situation but it definitely allows everybody's true colors and character to shine through and my real friends stuck by me and I'll never forget that.
Well if it's guys you say were nit friends anymore then they frown and try to make you laugh and if it a girl an you say that they will like hate you and so you'd say like how told you that...do you really think I would do something like that or like seriously