I hate to tell you this, but we've got to have ourselves figured out before we enter into relationships.
Now, if I were this woman of yours, the only way that I would even entertain the thought of trying again would be if you came to me with a full apology that went something like this.
"My love, I am so sorry . . . and I'm willing to prove it. I will do all reasonable things that you need me to do to wipe away the pain and agony that I have caused you, as well as any financial losses that I may have caused. I will do all things reasonable to have you back.
Here is what I have done so far to change my ways, personality, and characteristics (you fill in the blank). And, my Love, here is what I plan to do from here on out to ensure that I do not ever slip back into my old ways. I am committed to you. I will give you all that I am capable of giving. You will be my priority in all good things."