This girl playing me has been acting a lot weirder lately. I'm a virgin 16 year old male. HELP!!!?

I lied to people in my ceramic cl that I had a with a girl. THIS GIRL WAS NOT NAMED AND EITHER WERE THE OTHER KIDS AND NONE OF THEM GO TO MY SCHOOL. I felt very bad about it and feel like a man . I didn't do anything at this party at my friends house and the girl willing did so. It was also two years ago. This girl who sits at my table has always called me kitten and says I love you but seems to ignore me in my Spanish cl. Ever since I told people she has been jokin with me like lets have at this party (I Don't go to parties) and this kid who is throwin it say I have a water bed. I just want her to leave me alone but she won't. I would not tell her the truth because she can not be trusted. She always says how has your day been or is really nice but I think it is fake. She is always the one that brings up this event to the other people in my group. I can't tell anyone the truth as I will face public humiliation.