No question about the man card... I fell for my husband because he had a tiny Yorkie (no divorce leftover!!!)
Anyway, I think a second Yorkie would be just great for Bentley. I have 4 and two of them, Minnie and Mikki, are close in age (10 and 14 months) and are playing, fighting and chasing each other all day long while our 'elderly couple' Maximus (6) and Maggie (3) enjoy their morningafternoonevening naps...
The jealousy could be a lack of pack leadership from your side. It is difficult to treat Yorkies as real dogs but actually they are... yes, they are...
Please consider a rescue when thinking of a second fur butt... Thanks!