Adding a second dog.

[Niamh15]

Hi there.
I am new to this website and joined really to get other people's opinion on what type of dog to add to my home. We have a 4 year old male Tibetan terrier whom I adore. He is very quiet and laid back so I would like a playmate for him of his own kind. I am a stay at home mother so the dogs have company all day.. I had thought of either getting a second Tibetan terrier or maybe a cockapoo? Has anybody had these two breeds together cockapoo and Tibetan ? If so how do they get on? Or should I get another Tibetan? Any advice would be much appreciated.