Friends/girl problem pls answer?

I am 16, and i was hanging out with these people a long time ago. i am not a very social when it comes to girls, i can't talk to them. according to the people i am still immature. the people who i was hanging out with, i told them that there is this girl i like. later she was not with her boyfriend. so the people i was hanging out with were asking me about myself, i told them everything. but i was not able to talk to her because i was scared. after a while the people whom thought i was gay and wanted me to expose what i think about them. after a while i learned they were talking to the girl and her boyfriend behind my back about what i was saying. the people whom i was hanging out with told me that if you don't want to ruin a relationship back off and so i did. now the girl looks at me but i didn't feel like talking to her because its been too long i haven't talk to her because i missed to many movements for example the people whom i was hanging out with never told her about my bd and many more. now i am in a cl mostly filled with girls and i didn't talk to anyone for a whole semester because everyone is a backstabber i can't express myself. now this guy comes out and i told him that i was meeting new people by that i mean friends, someone to kill time because i was getting to depressed i mean i didn't talk to anyone for a whole semester. now i think that the guy told the girl that i was meeting new people and i think she took it the wrong way. now she thinks i was a fake and was really angry and i don't know if i should talk to her or just let the semester end because it has almost ended only 2 more weeks. the girl b4 she knew that i was gonna ask her out was with this guy with a hickie on his neck and then she said something and then they moved away. now she is trying to make me depressed. now she is going around saying i am a bad person. i want to settle things down but idk if i talk to her she is gonna go talk to 50 more people or she might say no. i do miss her what should i do ?