Please help me! I'm so puzzled!

Well There is this girl on ファンポップ who was really mean to me and now she is telling me she only 発言しました that stuff cause someone told her I called her a bunch of bad things ( and I didn't). I don't know if I should belive her または not. She was mean to one of my フレンズ too. May be she was just mean to her cause she was my friend. But she has a lot of フレンズ and seems to be nice to a lot of people.. idk. Please help!