Angelpotter, sorry to hear you have unpleasant repeating dreams. The good news is that you've got an awesome head start for lucid dreaming, and lucid dreaming is probably one of the best solutions to the problem. What you can do in waking life: close your eyes and go over one of those recurring dreams which you recently had, only this time imagine it ending in a more positive way. Mantra to yourself that "every time I see x, I am dreaming" with x being the name if your ex. Remind yourself that you are over them, and that you can control your dreams. Tell yourself that you can refuse to date x in your dreams. Also tell yourself, "in my dreams I can hide and not be found" or something like that. That way hopefully one of two things will happen: either your non lucid dream will be improved though your intensions, or you will realize that you are dreaming when x occurs, and then you can change your dream for the much better. Wishing you all the best!