A teacher of mine filed a case in school that is false

I'm a Grade 9 student. Yesterday I was accused by my teacher that I was kissing my bf which didn't happened and he stared yelling at me and my bf in the canteen during lunch time which had caused a scene. He brought us to the Office and he was forcing himself that he was right even if he's not and the good thing is that I have a lot of witnesses that we weren't kissing but there he was making a scene. Please help me I need to make my name clean because I know deep inside me that I didn't do anything wrong. Is there something that could make me win in this situation? The investigation is ongoing.  PLEASE REPLY THANK YOU