What engagement? So you think they clearly love and care for each other? Perhaps, we don´t know do we? Sometimes living together leads to marriage, and many many times it doesn´t. Whatever!
I know that I would never enter a business arrangement without a signed contract and I think that marriage is far more serious that a mere investment, because of that I just
can´t understand why people live together without getting married. In the case of Prince William, he is a royal and can´t be judged by the standards of the normal lives of people in Britain and especially in other countries, whatever he does he will come through it, no problems, but to be the ex girlfriend of a King or Prince of Wales or any royal Prince is not so good. Well time will tell, I never thought that Prince Albert would become engaged to Charlene and he did, he isn´t married yet but it seems that the marriage will take place so there is still hope for Kate.