i figured it out guys! i just needs a stronger bit. thanks for the tips 👍🏻
I think you should try using outside leg a little bit more. If your horse is unresponsive try using a dressage whip to tap him right behind your leg rather than hitting him. By hitting him you are telling him to go faster, he will become hollow and you don't want that because he won't be on the bit. I have had that problem once, but figured out that my horse won't do a thing unless she on a bit. By using a whip I just made things worse because the horse felt like she needed to run off and fight me. I trust that helps :)
What does your trainer say about this ? Maybe you could have a private class, without other students, to resolve this issue.