For my husband and I... well, he was the one that started talking about our future together.
And we had been dating about 2 months and already he was talking about marriage.. it freaked me out a little bit, but I loved him and even though he broke up with me twice before getting his act together. But a year later, we got married.

I think it's never too early to talk about your future together. Tell him what you want out of your life.. it is getting married soon. You both need to be aware of what the other wants in the future.