I have a tree frog that lives in my living room behind a chair. He leaves for a couple of days but always comes back. I call him Freddie. I think he gets in through the small space around the a/c. He has also jumped in my lap. Is this normal? He is adorable.
We are envious. How fun.
No, this isn't normal, and ultimately Freddie needs to overwinter outdoors.
Keep escorting him outside and providing a good pesticide-free environment for him out there: https://www.nwf.org/Educational-Resources/Wildlife-Guide/Amphibians/Tree-Frogs