“This is your brain trolling you. It decided at one point that the girl was appropriate to pair bond with and gave you great feelings. Those feelings also addicted you to her to ensure you partner and have kids. Turned out the relationship didn’t work out – but your brain still makes you feel bonded to her and gives you feelings of physical pain (emotional pain) in separation. All this is an evolved response that has nothing to do with the logical situation and everything to do with outmoded unuseful neurological features. Solution – troll your brain back. Distract it with other things and definitely remove any reminders of her from your environment. The pattern will shift. Just remember it’s nothing to do with her. Or all the romantic fictions we sell ourselves. Treat it like a chemical dependency – which essentially, it is.”