Well, I was not really thinking about the lines of her "waiting for him" until he proposed, but more that, IMO they were NOT in love when they met. They obviously had a good rapport, got along well and became friends/lovers, but not necessarily in love and considering marriage. At least, I don't think SHE was in love with Charles, I always had the impression that she wanted APB, was dating him and wanted to marry him.
I still believe that later, after many years of strong and deep friendship, their relationship became love and then it was impossible for them to get married. Charles would never never never be allowed to marry a divorced woman, so he had to settle down with Diana ou whoever else. But IMO, he was deeply in love with Camilla when he got married and his marriage would not and did not change that. That's why I believe he should have been honest and had had a convenience marriage from the start, telling Diana (or whoever else) everything - she could have said yes or no, but she would know she was not entering a normal marriage. But this a discussion for another thread!
I do have to agree though, that at that time, BP and other royals would make very clear to everybody - including C&C - that Camilla was not "wife material" and maybe that had some influence on Charles, maybe that's why he went away without proposing or talking to her about a future together. But I still believe - IMO - that Camilla was not in love with Charles at that time, she married the man she wanted and loved and only later her feelings changed.
I wish I could know the truth, OMG I am so nosy!