Legal Question in Family Law in Colorado

Not in Colorado, at least. A divorce, once accomplished, cannot be voided, and even if it could, merely seeing/dating your soon to be ex would not be sufficient. That said, it does not take much to become common-law married in Colorado either, so you can end up re-married under common-law if you get back together and start telling the world you are married again.

It sounds like you may not be completely divorced yet - in other words, no Decree has been issued. If you have not had your permanent orders hearing and have not received a Decree, you can mutually decide to back out of the divorce (and file a written request to the Court to dismiss the divorce, which you will both need to sign) or to ask the Court to issue a Decree of Legal Separation rather than a Decree of Dissolution (divorce). If you are not sure whether you want to get back together or not, you can also ask the Court to continue (move to a later date) your permanent orders hearing and give yourselves time to decide whether you want to reconcile or not.