I know this is a lot of info, but please read to the end, it's all important I promise!
My first gliders were an older female pair who have since passed away. They started out much like your girl and came out of their shells enough to play with and climb on me and enjoy my company but were never fully bonded
to me. We lost them only about 3 and 5 months after bringing them home, so we did not have much time to establish the relationship.
Take a step back and don't challenge her quite so much. I wouldn't try to pet her or even offer her your hand just yet. Let her come to you. If anything you do starts her crabbing, take that as her way of saying "That scared me, please don't do that again." It will take time to gain her trust.
One of the first things I do with new gliders is introduce myself via smell. I cut out small squares of fleece, put them in my bra for the day until they have picked up my scent and then add them to the glider's pouch. I'll do this daily and switch out the fleece squares until we move on in the bonding
process so the glider learns that my scent is normal and comforting.
Do you have a zippered bonding
pouch? If so, you can hang it in the cage and remove other pouches
so you don't have to force your her into it. Every day, work on dropping in treats and slowly zipping the pouch up, then taking it out of the cage. She may crab at first but she will get used to being handled while inside of the bonding
At first, just sit with her inside of the pouch, then you can begin to wear the pouch as you do various activities, talk to her and even gently touch her through the pouch. As marsupials, gliders are comforted by being in pouches
and wearing a bonding
pouch is a very passive way of getting them used to your scent, sounds
But more important than bonding
with you, this little girl would really benefit from having a friend. You don't mention adopting another glider. Sugar gliders are social animals and no amount of interaction on your part will replace the cuddles, warmth, grooming and play of another glider companion.
Many lone gliders will overgroom, self-mutilate or fall into depression regardless of the amount of human interaction they receive. There are rare cases where gliders need to be kept solo, but the vast majority of gliders should be kept in pairs if not groups. Remember, she is a wild animal and it is your duty to offer a level of care that provides what she would receive in the wild. This means a diet
that meets her nutritional needs, toys
and foraging opportunities, a spacious cage, safe places to sleep and companionship.