My ex moved on so fast. How can I overcome the pain?

And during this process, they either started seeing someone new who they planned to secure as their rebound option or were busy creating their post-breakup plan.

Instead, focus on taking care of, solving and healing what you are experiencing right now.

This is why you can't expect them to feel anything close to what you're feeling right now, because you and them are on a completely different stage in the healing process.

Why do flat-earth conspiracy theorists believe that photos from space, including those of satellites, are fake?

This happened long or shortly before they physically left.

You both are on polar opposites of the scale.

This is why comparing yourself to them in terms of the healing process isn't going to help you in any way, shape or form.

Is Jesus God almighty?

Simply put, because they have been prepared and you weren't.

What they do doesn't matter and it's completely irrelevant to your healing process, though it’s valid to hate and judge them harshly for leaving the way they did.

I.e. you thought that you had the perfect deal whereas they had already made up their mind and just weren't as emotionally invested in it as you were.

Had strong anxiety, heart palpitations, headaches and fear randomly over twin flame presence, 20 mins later he didnt acknowledge me saw a photo of a girl on the back of his phone faced up. Assume it was a new gf. Was this a warning of seperation?

On their side, there has been a process of emotionally and mentally checking out while you were still together and while you were under the impression that everything is cool.

So, don't try to compete with them.