I know many folks that are deaf in one ear, they have learned to adapt.
The replies above are all pretty good.
I have 2 CI's, as I am profoundly deaf in both ears. HA's were not good enough. I am a fan of CI's, but, I believe they should only be considered a LAST resort if all else fails.
Since you already have a good ear, you most likely will NOT benefit from a CI on the other ear, as your brain is already adapting to using the good ear for everything, and your CI ear will never be 'normal' again.
CI's do NOT give you normal hearing. They give you some hearing back, but nowhere near as good as a normal ear.
Wearing hearing aids in a partially-deaf ear probably will give you the same results as a CI....without the surgery, risks, etc.
And, lastly, if you have $80K to spend, any doctor will implant you with a CI, as insurance companies will not, since your other ear is fine.
Get another ENT.