Obfasculated
You're so stuck on your ex that you're like a kid who won't let go of a toy. They were scared of commitment, and now you're stuck in the past like a grumpy old man.
'I keep replaying our last conversation in my head like it's a movie.'
'I texted her 10 times in one day. She didn't answer. I'm still waiting.'
'I can't stop thinking about her even when I'm at work.'