What's the best way to make a girl miss you?

So me and my girlfriend broke up about two weeks ago. We have been dating for two years. How do I make her miss me? We have been playing the ignoring game for awhile now. Do I keep ignoring her? I bothered her the first couple days after we broke up which I know was a bad idea.
Updates
+1 y
She has only been contacting me to tell me that she has been sleeping out at another guys house, but he is only a friend and they never did anything at all. She also won't give me back my stuff and is putting it off.
Updates
+1 y
In my opinion, why contact me to tell me this if you don't care about me. And unfortunately I responded to the text messages like an ass. How do I go about making her miss me and how do I respond?
Updates
+1 y
I forgot to mention that there was one day where she texted me saying she still loves me but can't take me back right now. And then ignored me ever since.
What's the best way to make a girl miss you?
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