My 7 month old "Jack" sleeps with me. I think he started sleeping w/me when he was about 4 months, maybe before. I just always take him out to p-p before we go to bed. My DBF didn't like the idea at first, then one morning I woke up to the DBF secretly trying to get the dog to kiss him.
LOL He is so jealous! When it gets late at night Jack starts looking at me like when are we going to bed? He starts at foot of bed and ends up either on my head or next to me on my pillow. I have even woke up and he would be laying on his back like a human. I love my Jack. I also have a new yorkie she "Josie" is 11 weeks old today. She is so small and stays in her crate at night. Hopefully she will teach Jack how to stay in his bed someday.