I havent been following this saga, but I think you need to take time off from this relationship for a while (at least a month) and check your head.
You need to decide WHY you want to apologize, before you offer one. IF you realize this urge to make up is out of fear of being alone, and you're feeling desperate, then DO NOT apologize. If, however, after an extended period of time without any contact with her you decide fear and/or desparation arent influencing your urge to make up, then sure call her up and make amends.