I have a Serious problem with my girl friend well my x now and i need advise??? she is 19 i am 21?

we had been dating for 9 months and i found my self treating her bad like if i had dominated her or like if i was the macho man, my self being to her was more of a cold person not lovable meaning not showing her how much i love her.she told me to try and to try to change and so i did but i guess it was not enough.little by little her feelings were changing and now i have lost her. i treated her in the worse way possible and now i realize how she felt. it was not my intention, i love her, she cried alot for me and now i realize how much i hurt her, the way that i am feeling she felt many times. just on monday it was over between us and i went to her house that night and talked to her in every way possible for her to give me a chance and she said that it is to late that she doesnt lov me any more and that she is hurt really bad for the way that i treated her and of my self bein.i do love her,it is my1st relation and find in hard to show her.Do i still have a chance with her?whatcan ido