Hello,
I have two gliders, Lilly and Lulu. Both of my gliders took a while to bond. They are still not fully bonded and they are both a year old now. When I first got them, they never liked to come out of their cage and if they did they would run away from me and avoid me at all costs. Now, almost a year later, both girls love being out of their cage. Lulu will glide right to me and sit on my shoulder all day if I let her. Lilly is a little more stubborn. She will come out of her cage, but will only stay on me for a minute or two before she runs off to explore. If I shake the bag of yogurt drops, both girls will glide to me in an instant. (Sometimes I let the girls run around my family room. When I want them to come back to me I just shake the bag, it works every time!)
Don't get discouraged, it just really takes time. When I first got Lilly and Lulu, after a month of consistently trying to bond with them and failing at pretty much everything I tried, I began to get discouraged myself. (I know this is not good, and I probably should not have done this) but I began to get so discouraged that there was a week or two where I kind of just gave up. I of course fed them and changed their water, but instead of letting them out of the cage I would spend some time sitting outside their cage. I would feed them some treats and talk to them, but I would not allow them to come out. (They did have plenty of toys and a wheel, not that that makes it right, but they still did get exercise). I was tired of always trying to find them once they hid, and Lilly was (and still is a little bit) of a biter. After the couple weeks I decided to try again and then this is where the bonding process really seemed to take off. They actually seemed to miss me! I saw improvement first with Lulu, then with Lilly. I first noticed the girls hanging around me more, then I noticed when I'd walk by the cage they were always out in front wanting me to take them out.
Now it is a year later and both girls have made incredible progress. They are still not fully bonded, but I would say Lulu is close, and everyday I see tremendous progress with Lilly. My best advice is to keep at it because once you start seeing the improvement it is the best feeling to realize you have started to gain their trust. Every glider is different, so you will learn your own tricks with them (like me shaking the bag of treats for them to come). You're doing great, so just keep on doing what you are doing! You will get there, even if you feel like you won't.