I think you're doing great- trust your instincts! And that BCI- she was the same way- she loved to be out with me- I'd take her for walks (she was on my shoulders- I did the walking) in my back yard (when the temps. were good), & inside, she loved to wrap around me while I'd sit watching a long movie, & she STILL didn't want to go back in her home, hahaha! That can be another kind of rodeo when they get big- putting them back!- but I think you're well on your way to having a trustworthy, mellow boa.
There is one "other" kind of bite, & especially from a boa, I'd not wish that on anyone- don't get in their way (within reach) at feeding time! Use long feeding tongs-Mine had a very impressive appetite, as I'm sure yours does too.