Oh Ronda, I feel for you. You have certainly been trying everything under the sun and showing such patience while your heart aches. You certainly set a great example for all. :-)
This will probably be a shock to some, but if you are not successful with using the "Step-up by force or I'll towel you and snuggle" methodology or you feel it is harming the relationship and trust you have built so far, You may need to clip the wings so she will be reliant upon you and family for transportation to and from her cage.
This would be the last ditch effort, but the good news is, feathers will grow back. :-)
Some have been successful in doing this and then still having a good relationship once the feathers grow back in and they become flighted. Others have found once flighted again, they start pulling away do to their re-found independence and no need for transportation by others.
I hope this helps and I would truly love to see the trust and relationship grow closer than it is presently. Even if she doesn't become a "snuggler", she may atleast want to be with the flock in closer proximity. :-)