Most Helpful Guy
My take is that a lot of times people can read too much into texts/emails... if he would have said that in person and you could hear his voice inflections it would have been different.
Most Helpful Girl
If you wasn't comfortable with what he said then you did the right thing to not respond to it, he could have meant it light heartedly. If it was me in that position I'd have just said it's too soon for that in my opinion but who knows what the future can bring :) If you still want to chat and meet up etc then just message him again.