There's no hard and fast rule here. You have to decide what you are comfortable with. You seem to like to email and text a lot so maybe what would be good for you wouldn't be good for someone else.
But the point of online dating is to MEET. So you need to decide how long chatting can go without meeting. Does it feel like it is leading up to it or do you think the other person is wasting your time either because A) they are timid about meeting B) they're not as interested in you but chatting is ok or C) they like the online attention but not for real.
If someone is really interested in ONLINE DATING and not just playing around - they'll agree to meet. Personally - I think after 3 or 4 chat sessions or a week or so. But that's my timeline. Or at least - the one I used to use.
Depends on the circumstances.
And yes - most people are talking to more than one person at a time. And you should be as well. Don't put all your eggs in one basket.
