Well, you are not supposed to get them to want you back, they have to want you back without you even trying. If they never come back, they aren't the right person, everyone will find their happy ending someday.
If they have a girlfriend they do not want you back.
get over it
because this preson still has feelings for his ex-girlfriend
If you really want your ex girlfriend back, I would just talk her about your true feelings. It really depends on how long you have been apart.
Talk with her , the best way to get her back is to be honest & upfront with her .
Because they want to get back with you.
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If you are indeed keen on getting your ex girlfriend back, even if her ex boyfriend want her back, what you can do to make sure that he will choose you is make her see your best foot forward. Show her how better you are over her ex, how happy you can become if she decided to come back to you and how things will be better now.
Tell her that you love her and that your sorry and that you really want her back
tell her that you are sorry then say you forgive her
Get a life and find someone else. Geeze,I mean she's already moved on so stop obsessing. It won't help.
Fake like your going out with another girl then your ex would want you back.