From watching them from season 1, where carrie was desperately trying to create some sort of relationship, but he was older, been there done that type scenario, so was quite casual and cautious. She found herself "actually posing", a phrase I've recently learnt can be true (as I've found myself in this scenario) so can relate. But I don't think Big actually did much wrong in the early days, he was just, him, and wasn't going to rush into anything too soon in the way carrie wanted them too.
Then skip to season 5/6, they've somehow built a comfortable friendship/sex is always on the menu relationship build purely on history and a mutual like/being comfortable with eachother. I've found myself in the exact same position (No pun intended).
Over the seasons, how did you interpret their situation?