Did you know that Prince Williams and Kate dated for ten years before he proposed? Allegedly, Carole Middleton once had a conversation with him, asking what his intentions were toward her daughter.
The pressure on Kate was enormous (remember Waity Katie??) and Carole didn’t want to see her daughter publicly humiliated if William were to dump her after so many years and marry someone else. He gave her Mother his word that he had every intention of marrying Kate but it would be when HE thought the time was right and would not be rushed.
I think he is very much like his mother in this way; William will NOT be told what to do, how to do it or when to do it. He respects the institution to which he belongs but he refuses to be dictated to. He has a backbone of steel, something his father greatly lacks I think.