It does not matter who initiated the divorce, you will always be left wondering - should I stop this divorce? If you were the one who initiated the breakup, then things would be easier.
Yes, you have to go to your ex, explaining you acted solely on emotions and without thinking.
This apology may or may not work, but you still have to do it if you want your love back.
You have to emphasize you were wrong and promise you will mend your ways.
Promises are a dime a dozen, your ex will look on them with skepticism.
Of course it will not be easy to reconcile.
The fact that you ex agreed to the divorce means that the two of you will have a lot of things to work on.
You will have to find out why your ex agreed, is there something that your ex decided to not put up with anymore.
And what is it that you cannot put up with that led you to want a divorce in the first place.
Think hard and see if you can come up with the reasons for not putting up for each of you.
Even if you did not initiate the divorce you still have to come up with the reasons.
So call up your ex and tell him/her that you have discovered something and try to set up a meeting.
Remember at the meeting not to start blaming.
You are already past the phase of blaming, now is the time of letting go and forgiving.
Are you transgressions and your ex's transgressions so severe that both of you should breakup? After discussions you both will probably agree it is not that bad and things can be worked out.
If you can get to this stage you are on firmer ground and the end of the tunnel should be in sight.
Remember if you don't find out your mistakes things will just stay the same.