HELP ME NEED AN ANSWER SHOULD I LEAVE?

ok well I've like this girl since about januaray. And towards the end of febuaray I asked her our our first date . She said yes of course so we did. It was great she "really likes me" well shes in a lower grade than me so i would walk down to her grades doors to wait with her , well everything was good she would like be all over me but then wen we were over by her homeroom she would say wait 4 me after school please, meet me by such and such place. And after school she would never come. things have gotten better since we borke up and got back . but then theres times where she has lied to me . I've cried over her all night because i love her. Things started to change since the last time we broke up shes not dissing me anymore , she writing me songs and stuff. But then theres still poeple telling me shes a hoe and she cheating on me. I saw her with theis guy quinten they were holding hands. (she doesn't know i saw them holding hands) then when i got home i called her and asked her about them telling her that all i ever asked from her is to just be honest. She says yea were still together. i say ok becuase shes being honest and i thold her i would be ok if shes honest. Then the next day because she got kicked out of school and put in night school i came to pick her up like usual and she wanted me to call her boyfriend quinten and tell him that she can't come , but since he didnt pick up we ended up waiting for him . When he finally comes out his apartment he grabs her and starts talking to her. Then he comes up to me and says r you two together? and idk wat to say so im like ask her shes your girl. so he does she says no so i say im out. That night she ended up callin me how many times so my friend or ex friend and i walk to her house which in down the street from mine . we satrt talkin she says sorry and stuff and tells me why she said no. then she started kissing me and that girl is the best kisser . and when she walked away she flashed me. Well then next monday we went to my friends house the same one that was with me before. his name aboubacar we were going to mess around. Well she skipped light house for me and i skipped softball for her (mistake) well we started to walk to his house wich is like over two bridges and stuff . Quinten calls her so shes like oh i have to go somewhere and gives me a hug and then a kiss on the cheek and says i love you. when i get to my friends house she calls and asks 4 me to go get her. so i have to walk to stine cliffe and get her. He's with her and i HATE him to death . well their all over eachother and im ok with it i was actually sayin in my head kiss your girl already. so we get over by the river and she takes my hand . we're walking with our hands inter twined and he starts getting mad but she don't care he tries to get her hand . then when we get their she puts her arms around me and her head on my shoulder. we go into the back their all over eachother on the bed. She says i have to go to the bathroom and says nick come with me so i go . She says im sorry 4 bringing him but he called me , he's leaving at 7 then u can have me to urself . then she pulls up her shirt and bra im just like wow. Then she starts kissing me fren with them outside the door listening shes a loud kisser. im like shh they'll hear you and she says i dont care. when shes done she says ur a better kisser than him and poens the door. quinten says o their was some kissing action there we're like noo.. he says he could hear it. well the day keeps going on until 7 he's getting ready to leave she walks him out said they sit on the steps they're out there for a long time so we go up the other steps above them and listen to their convo. He tells her to leave now with him. sso she gets up and leaves. i go out and say wat the **** r u doin? she comes back and says ima go and gives me a hug. im like dont touch me. then my firends cousin is like y u making her leave . quinten says im not she wants to im leaveing either way. she says yeah. then he satrts running cause aboubacar says loudly im **** him up lets go. sapphire satrts running too. aboubacar says come here sapphire so she does and says wat ? he says talk to you girl im like no let her go i dont even wanna talk to her! he syas y r u leaving and she says ima stay. im tired of following him. then when we go around the corner she says i didnt wanna leave he was making me. we went back in and idd somethings. well everything was good , then next day my teacher who is aslo her nightschool teacher puts two and two together and figures out that we're together and we we're together last night. then she tells me when i see her she broke up with quinten to be with me. shes over him . then the next day aboubacar tell me during my violin sctional shes straight i drop my insrument and leave . i ask her brother who is one of my closetest friends and he says no its not true. then when i go home after school @ 8:30 i