I don't think there's anything wrong with it. FH asked me to marry him the first weekend we were dating(it was a blizzard and he got snowed in and had to stay in my dorm room with me). We just knew we were meant to be together the moment we saw eachother(so cliche, I know... but, we ARE an exception). But, we also had a long engagement- 3 years on Feb 3 2008.
Now, if you two were getting married a month after dating, then I'd be worried. But, you two are planning a long engagement and I think that's best, IMO.
I guess the thing I would stress is asking the REAL questions; not silly stuff like, "Does he love me? Does he think I'm cute?" No, the stuff like,"Can our religious beliefs co-exist together?", "Where do children fit in?", "What's the other person's parenting style?", "Will kids be home-schooled, attend private or public school?", "What about work: Will we both work and have daycare for kids? Will one of us stay home? Who will stay home? Who makes the most money(kinda silly to have the one that makes the least amount be the primary provider)?", "Where will we live: near family or half-way around the world?","Do we want to rent an apartment or own a house or trailer?","What will our home look like? What sort of decorating style can we compromise on?"(Oh, yes, you definitely need to talk about that one if your idea of Ms. Pacman wallpaper is not something you want to wake-up to every morning)
Those were just some of the questions FH and I asked ourselves and eachother to make sure we were both on the same page. ANd with a long engagement, you'll have time to get a good headstart to making a fantastic future together; you can save money for a fantastic wedding and really explore your relationship and discovery a plethora of information on your FH and yourself. So, I wouldn't worry about what your families think; this is about you and FH. Enjoy it, :).