So i need relatioship help with my woman...?

Me and her met, and became friends.. after a week or two we got together.. then she was scared we got together way too fast and we broke up.. then a month later were together again. we had 4 months of nonstop fun, excitement, Love, affection, and her family loved me to death. However I lied to her when we first got together.. I told her i'd never gotten far with another woman. that was a lie, i never had sex, but i got kinda far. And it really bugged me that i lied to her. I couldnt handle lying to her, and she was such a dedicated and loving girlfriend that it killed me to tell her.. We lost our virginities to eachother and everything, and she was dedicated to nothing but my happiness. But i was starting to crack. Im not a liar.. It kills me to lie about anything, so i started getting pissy. I started not seeing her as much, avoiding everyone, and doing everything in my power to distant myself from her so i wouldnt tell her. I thought once she knew, she would sink from happiness, and i wanted her to be happy. I know i shoulda told her earlier. But i diddnt. I never wanted her to think bad of me, and i realise now that i would have been compeltely wrong to think that, she would have never thought bad of me. But now everything has changed. My distance, anger, and sadness led her to be depressed for a while. 5 months into it, i dumped her out of random anger because she pissed me off.. I had no right to hurt her like that, but she cried for days. We were so in love that anything we did we noticed. she noticed my distance and thought i was finding someone else. But i wasent, i was cracking under the pressure. Her friends saw me as a jerk, and i was starting to become one. I was sweet to her sometimes, there were times when the light came back to her eyes and she glowed. She did anything she could to make me happy, and i sacrificed a very promising football scholarship to be home with her. I diddnt wanna leave her home, i thought she would get lonely, and depressed. But then well after i stayed home and decided to be with her, and get an okay job, and just finish school and start a career, she started being pissy all the time. she became MUCH more forceful about things, and stopped responding to my touch. I used to be able to tickle her down to her knees, kiss her and feel the blood rush to her cheeks. She is 15 years old, and i am nearly 18. We see eachother more now than ever before, and everytime im around her she gets upset extremely easily. So moving torward the present, i couldnt handle the lie anymore and started to tell her, but she cut me off countless times, everytime i tried to tell her. the lie itself is not huge.. its the fact that she thought everythng we had was about love and honesty. We told eachother everything else. I just diddnt tell her that. I got mad at her easily now, we stopped having sex after a while, and stopped wanting to be beside eachother. Then out of nowhere she stopped wanting kisses and hugs. I got her stuff, told her she meant the world to me, and even planned to marry her. but none of that matters now, because about 2 weeks ago she left me because of the lie. I've been nonstop talking to her, trying to get her to come around, but it just angers her to talk to me. Her friends and mother say that she still loves me dearly, and she has said it herself... reluctantly though. I messed up the perfect relationship, and now i just wanna see the light in her eyes again. I want to be back with her, but she says its gonna take a very long time IF we ever get back together. Help? Advice ? anything would be cool..... i cant eat or sleep, im sick as a dog, and i miss her like crazy. Ive apologised countless times, and i came clean on my own..