It COULD seem unhealthy to some people.  I'm not sure how true this is but I thought I read somewhere that yorkies take on only ONE human as their alpha.  That seems quite true in my case since Magnus/Zoey will obey/adores me the most even though my parents spoil them.  
 
As Keeganriley said, you're his whole world.  Of course he always wants to be with you!  
