I don't know what to do now

If you ask about first love , it happened in when I was in class 8 , a girl used to like me , all the classmate used to tease me , but I was in love with her best friend ,so never told her , when I get to class 9, she and mylelf were alot more closer ,she used to share all the things , she liked me too but we never proposed each other , but one day a boy told a slang word in the class, but she didn't know it , she forced me to tell the Meaning if that word, but I ding tell , getting angry i told her go ask that boy. Then he told me ... She was very temperd that he din't spoke to me ... We didnt spoke in the class or anywhere for whole school time after that ...we somehow came closer after SLC but it was too late ... She was already dating my best friend so I left her to him with broken heart ... Now she is also broked... But now she is dating my childhood friend . Friends always turned as my enemy 😭😭😭😭😭😭😭 now I am about to go Australia with in week having lots of memories of her. I don't know what to do now