We broke up, I realized my mistakes, feel like I will always regret not being with her? What can I do? PLEASE!?

I broke up with a woman a year ago. Since then, I had seen other women that I didnt care for but hooked up with all the same. I realize how special she is and made a decision. I was about to go another country for a well paid position and quit it to be with her. She can't get over that I was with other women, however, even though we had broken up. She thinks that I broke up just to fool around but the reality is that the relationship was full of pain, admittedly much of it my causing. Women and men, is there anything I can do? I dont care about being alone, its about wasting my life without her.