What's the deal with my ex?

My ex and I have been apart for over a year. However she and I still talk almost everyday. We have shared many holidays together. Including Mother's Day recently. We have 2 kids. We lived together for 8 years. But she never brings up getting back together. When I bring it up she doesn't say Much. She says that maybe in the future but not in the near future. I try to be there and show her that I have changed and that I'm seriously commuted to making it work. I'm affectionate to her. She doesn't show much affection other than playfighting and she occasionally hugs me back. What should I do? Should I just give up?
What's the deal with my ex?
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