To the OP.....
What I would personally do, since this horse seems to be an issue for you at your barn. I would exchange three riding lessons for groundwork lessons with this horse....from getting him in from the field, lunging, dealing with him in the stall......you might find that you enjoy the challenge and reward of groundwork a lot better than you do riding!
It would be a big confidence builder for you and make your time at the barn a positive experience.
Remember some people are just riders......some people are horsemen.....(or women if you want to get all uptight about equality!)
I might offer, "Hey, do you want me to do some groundwork with that horse?" but no way in heck would I actually PAY for it.