[WeLoveOurYorkie]

I have a three year old male yorkie and he is very attached to my husband and me. Every where I walk he follows and when my husband comes home from work he waits at the door jumping and so excited. We love the fact that he is so close to both of us but sometimes he seems sad. when we sit on the couch to watch tv he will walk over to his little bed and just curl up on it. Sometime he will want to play with a toy and we will play fetch but he has not wanted to do that very much lately. We though about getting another yorkie so that he would have a friend just like him but, we don't want him to become so attached to his new friend that he will no longer want to spend time with us. We thought about getting a little female but we also don't want him to start marking his territory.
I guess my question would be: If we did get him a female friend will he mark up the house and not wait to have as much to do with us?
If we were to get another male: would they fight and would they both mark up the house?

Thank you in advance for your response