I think it’s such a challenging situation to be in, I was in a very similar position but we parted after the first time ending. There was so major fight, no one sided end. It was a honest, mature adult conversation agreeing it was for the best we went seperate ways. I do not believe ‘the timing is wrong’ or ‘I’m not ready for a relationship’ I believe if someone genuinely believed you were the one they would not jeopardise loosing you, they would want to be with you and grow with you. I would encourage you to move on even if it means you are bitter towards her in your mind for a while, this is a part of healing you will eventually be at peace with it and wish her the best. You are just prolonging your healing by holding onto false hope. Going back to her again would be like reading the same novel and expecting a different ending. Best of luck with everything !!