Nothing is wrong with you. Gliders are what they are, lol, and I still feel that way about mine. They do not love me like I love them and probably never will. And yes, this bothers me a lot, at times. But then, I think reasonably, they are basically wild creatures, being that they are exotic, not domesticated. Yes, there are those out there with gliders that seem to adore them, phewy, good for them, lol. My fur brats are who they are, and because I love them so much, I accept them for whatever I can get from them.
I do understand, my X got more love from my girls (before being an X) than I did, and it was the same thing. I took care of them and spent the time with them, and occasionally he'd show some attention and wow! They'd be all googly-eyed (exaggeration) over him, lol.
Hang in there! Each glider as a different capability and rate at which they bond, just keep working on building the relationship and accept what it is. You will see progress, maybe not everything you want, but there'll be some, and you will want to celebrate it!