At the end of the last season, when Mr. Big finally admitted that Carrie was the one and goes back from leaving her friends for Paris, she mentions
..later that day I got to thinking about relationships. There are those that open you up to something new and exotic. Those that are old and familiar. Those that bring up lots of questions. Those that bring you somewhere unexpected. Those that bring you far from where you started. And those that bring you back. But the most exciting, challenging and significant relationship of all is the one you have with yourself. And if you find someone to love the you you love, well that’s just fabulous..