The Queen Had To Be Sure They Were Serious
Although Kate and William were able to go through their college years together, their relationship had not been very lucky with surviving the circumstances after graduation. The head of the Royal Family did not have the time to be introduced to every woman that her two grandsons went out with. Kate had to wait for a long time before she finally met Queen Elizabeth II.
Kate and William already made things official back in 2003, but it took almost five years before she could meet the Queen. It was a year after their breakup that Kate was officially introduced.
It Was No Casual Fling
It took almost five years to make everyone realize that the relationship was serious and that Kate was definitely here for the long run. We know better now, but nothing was certain back then. The time they spent apart after breakup allowed the couple to realize how serious they really were about this relationship.
From here on out, it would be the two of them together, and William and Kate were clearly not taking any chances. She started to go to Royal events, proudly standing beside him as his partner.