Loners

My partner and I are loners. We do everything together and don’t have any friends other than family. We have discussed it and both of us enjoy our quiet life this way. Occasionally we will join acquaintances for drinks or dinner and we do enjoy the time for a little bit but after a few hours we just want to be home together. Is this a “normal” way to live? Recently we talked about having more friends but then realized we would have to commit to having friends then and would lose our time together.