Is there any way you can post videos of him? Kinda show us what he does? Someone was right when they said Arabs are really only horses, I have found that Arabs really don't grow out of their immature thinking until around eight. In the meantime sometimes their timidness and irrational fears are reinforced by exactly what you've described,an owner or handler not confident enough to correct them. No judgment on you whatsoever,I can only imagine how scary it must be for you and I agree you should sell him