What is the best way to act around Ex's so that you can regain any lost value and attraction that was gone?

Sounds like this same question

https://www.askmehelpdesk.com/relationships/regain-value-216499.html

If you cannot just be yourself, and have value for yourself, what's the point? Why not just move to the next adventure? Forget the ex(es).

You should never change the way you act for someone. Just be you. That's all.

Be who you are-value yourself and forget the ex.