Are you interested in him romantically at all? Do you know how old he is, what he looks like, etc.? Do you talk to him every day or just once in a while? I think we might need a little more info.
Mainly, don't feel pressured to go out on a date with him or anyone, just because he wants to. You go out with people who have enough potential to be partners. Until you've found out if he has partner potential, why date him?
You do need to be careful with men you meet online. There are a lot of predator-types out there.
“Inside every cynical person, there is a disappointed idealist”--George Carlin