Is there any chance getting my ex back?

[Harry]

We have being seeing eachother on and off for about 3 years, in that time we have split up about 10 times mostly my fault. We have a 16 month daughter together. A lot of the break ups have been after I have had a drink and been nasty to her. 3 weeks ago we decided to give it another try and after a night out I text her to end it, I don't know what I was thinking but when I woke up the next day I regretted it and wanted her back. I have told her I will stop drinking but she says she can't forgive me again. What can I do to get her back ? Thanks