what is going on? !!

[Briceno1]

i met my girlfriend on facebook the year before last. she is mexican and lives there. as i knew i would be coming to mexico in the future for work, we began a relationship online which progressed into a real relationship until we finally met in person in may of last year. things kind of got off to a rocky start because my work was extremely demanding, added to that the pressures of living in a foreign country. i know and accept full responsibility for the fact i neglected her and did not give her nearly the attention i should have for most of the time i was there. she was very good to me and very attentive. i was, for the most part, an *******. i often came home from work stressed out and irritable. when i did give her attention, it was half hearted at best and i could often be mean. not verbally abusive or anything, just kind of a jerk to be around and taking her for granted a lot. as work pressures died down (around the end of last decemeber), i began to realize what a beautiful person she was (inside and out) and how lucky i was to have such a person in my life. i apologized on several occasions for my actions. i told her i was really beginning to fall in love. she told me that she had loved me all along. i dedicated to trying to make things right between us and made every effort to spend quality time together. although we still had occasional differences (mostly due to language and culture) it wasn't anything like before. things improved a lot and i began to develop strong feelings. this period lasted until the beginning of march when i had to return to the states. we promised to stay together and wait for each other as i will be returning later this year. this is where the trouble began. i promised to call her most days. things started off well and we were talking frequently, saying how much we missed each other. then i became busy again and didnt call for a few days. i received a text message from her which said we needed to talk. i called promptly and she said she had been thinking and didnt see it working out and decided she didnt love me anymore and she hung up. a few hours later a received a call and an apology with the outcome being that she was feeling insanely insecure because i hadn't called her. i forgave her and let it go, explaining why i hadnt called and telling her that if she was feeling insecure to tell me and we could work it out without resorting to extremes. in light of how i treated her in the past, i figured i deserved this anyway. since then i have really tried to reassure her. i had been feeling her a little distant the last few days and asked her about it tonight. she said she couldnt let the past go and was still very hurt and angry about what happened and didnt want to be with me anymore because she couldnt get over it. i was really falling in love and made sure to tell her frequently that i really appreciated her. too little too late? what should i do? i really want to be with this girl. help!!