Maybe you can give her your new number when both of you are feeling better. In the meantime, you could call her from a neutral location and meet in a safe environment when you are feeling a little more ready. Something to consider anyway, unless you really need to make a clean break for good.
But for now you need the variety of many friends to strengthen your support system, and to take your mind off her for awhile and focus on the simple joys in life so you can at least smile.