Ex girlfriend messing with my head?

Broke up with me 4 months ago and wanted space. I didn't chase. She started to play games right after the break up. Flirting with guys in front of me, hot and cold, and other stuff I can't even remember.

Her behaviour has been way off recently. She stares at me a lot, always looking at me whenever I talk to any girl. She liked my instagram photo for the first time since the break up but didn't like the one that followed the week after.

One of the weirdest things though, around midnight last night, I got a quick phone call from her. I was partially sleeping and didn't pick it up.

Why is she wanting my attention so bad? what does she want?
Ex girlfriend messing with my head?
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