First, big kudos to you on the almost overnight progress! That must be encouraging. I think she'll keep coming around for you. Here are a couple of ideas.
Horses are naturally curious, so capitalize on that! Spend lots of time in the barn/pasture. I always talk and sing to my horses. I usually pick some old spiritual or song like "Dinah Won't You Blow" or some song I can sing over and over in a low tone. Do the things you need to do and just don't pay too much attention to her. Sweep, shovel manure, pull weeds, organize the tack room, repair fences, whatever you can think of. Stay non-threatening. It's SOOO hard! I know you must want to drape yourself over her and kiss her nose, but take the time now to help her feel safe.
Take a book or something you can work on, such as untangling a rope or cleaning a bridle, or reorganizing your brush box and sit where your horse can come investigate you in the pasture or paddock away from where she's standing. If she's really skittish, you might want to skip bringing a chair, but sit on a turned over bucket or barrel or a bale of hay. Be careful you don't get hurt. When she comes near, talk or sing to her in a low quiet voice, but resist the urge to reach out and grab or touch her until she seems ready to accept it. If you reach for her and she jerks away or seems uncomfortable, keep talking or singing and keep your body still. If she doesn't come back within a few seconds, go back to what you were doing. Try doing this as often as you can (several times a day is ideal, but once every couple of days works also). Eventually you'll be able to touch her, then rub her, then brush her, etc.
Let us know how it goes.