I Own two Yorkies and at first it was hard, i'm not going to lie to you. But you know people said it gets better.. and It Did!
I don't love one more than the other, i love them so much both equally. I think it would be a great Idea for you to get your little one a companion and get one soon before he gets to old and might get jealous.
I do love the company of having two yorkies, cause yorkies rule! and having two is just so much fun, never a dull moment. and you always know that there are two furbabies waiting to see you everyday!
I too have never owned two dogs at the same time in my life. well maybe i did when i was two, but i never took care of them. So this was a big step for me and i'm glad i got two. I'm actually wanting to get a third! and then maybe later down the road i want a 4th!
Whatever you decide, best wishes and hope all works out with the parentals!