First of all, get a job then win her back after. But before you do that, make sure you prove to her that this time, you are worthy of her love and that you love her for real and its not just purely physical or lust that you feel for her. And one more thing, you don't expect her to come around so quick and take you back as soon as you ask her. You need to work for it and be patient. You have to earn her love and trust all over again.