I messed up my reputation?

Hello...so, first of all i was organizing this really big birthday party for my 17th birthday, and then suddenly, the day before i found out that only 15 people out of 60 were actually coming, and that my boyfriend didn't want to come either. i called him and we broke up although he was telling me that he was just joking etc. in the end, my bday party was pretty good, but i had a little too much fun. we played spin the bottle and i ended up kissing my best friend, and we were hugging and stuff for the rest of the night. his gf broke up with him and now she hates me. then, we played truth or dare and i ended up burping out the truth that me and this guy from school kissed while i was dating my boyfriend, but he made me kiss him and it wasnt my choice since i dont even like him. ew. then, my ex boyfriend's girlfriend pretended to be my friend, i dont know why, and her friend now wrote on the school's tables in the garden 'andrea is a ' etc etc etc. now, im not in school cuz im on study leave so i only go to school if i have exams, but when i will go i will be dead. i feel so humiliated and i dont know how to react to this. please help...