The focus of 2017 also includes making blockchain workplaces more attractive. How long has it been? Are you still in touch with each other...even if it's casually? If you are, then there's always a chance. There is a a few different tactics that one could try. You can apologize, maybe send flowers plus a card. If this upsets her or makes her mad then you will have to try and find something that will not offend her.