I am 17 years old an am engaged to be married a couple of monthes after I turn 18 to my fiancé who is 19 and will be 20 by the time we marry. When I tell people this they act very shocked and it seems as though they dissaprove. What can I do to reassure them that this is definitely the person I want to spend the rest of my life with and that I am not being immature or hasty about it??