I second that which Possum said.
Take this slowly. What's the rush?
Sounds like you both reside close enough to be able to meet in person with little difficulty. With that as a possibility....I'd certainly take it somewhat slower....get to know him better over net first. And definately confront him about the topic of marriage. Sometimes, tackling these sorta subjects behind a screen is easier than in person.
You've received some good advice regarding the safety tactics of meeting someone from net.
I hope the best for you.
Be careful.
Shangrala