Have I lost this girl forever?

hey guys, just a quick summary of ma situation here. I kindda liked this girl 3 years ago, we started talkin and stuff, and then somethin pulled me away from her i donno what it was but i wasn't that much interested in her no more. So i stopped txtin her callin her and all that ****. She was too proud to ask me whats goin on, she acted like she dont care if i call her or not. so I just let her go. a year and a half p, and i see her with her friends at a store. I couldnt help but stare i mean she was hot, and i started thinkin about how i did her wrong, she saw me stain and looked at me and smiled, but then started ignorin me. actin like she dont know me . i mean i get it, she was with her friends and all of them knew how i did her wrong back then. and knowin her thats the kind of reaction i expected from her. so i kept thinkin of her all day long, i knew she changed her number, but i found a way to get it. i txted her, she acted like she dont know who it is, so i said its me. she was all like y u txtin me what u want who do u think u r , dont try talkin to me, i tried explainin it to her, she kindda got it, so after that we started talkin normal, and then one day i txt her 10000 times in a day she dont respond, i call her she dont pick up. so i went to her house. she was home. i asked her why shes not pickin up , all she said was its bad isnt it? i looked at her and asked what u mean, she said nothin i think u got it. so she left me just like that. but damn i like this girl so much, i said im sorry for leavin her first time she dont care, she made it seem like wer all good again, and then she let me down like that. i need edvice, please help, what can i do to get her back?