I'm with kml on this one. M stood out as an introvert right away. It's hard for extroverts to understand how a person could choose not to be with loved ones, but as I have gotten older, I have slowly come to appreciate that 'recharge' thing.
Also very much understand J9's point of view and yours re the birthday dinner. I can't remember if you said, but had M spent a fair bit of time on his own before linking up with you? Maybe he's a bit stuck in his ways still?
