It sounds to me like you both are desperate and are to be honest cowardly for just wanting to get back together because you either cannot find anyone else or your relationship that you had is too familiar for you to move on. It seems like an endless loop that needs to be broken. In this situation, I would blame both of you for such idiocy.
I will do my best to reply with an educated, humble and honest answer. Ultimately, it is up to you whether you want to listen to my advice or ignore it completely. Sometimes, my advice may be wrong; occasionally, it will be right. Regardless, I want to do my best to give people answers they are seeking.