I recently broke up with a boyfriend who was more introverted than I am - which i was okay with - but he seemed unwilling to compromise for my happiness. Long before I met him, he had a habit of disappearing for a few days (up to 4 or 5) every month for some "quiet time". His friends had grown to accept it, and not worry about him while he was gone. I however, could not. It would've been fine if he let me know when he'd be taking his "quiet time" so i wouldn't become sick with worry over unanswered calls and messages, but he'd disappear without a warning. I felt that was selfish of him. It's too bad as well, since he is otherwise a lovely person.