When meeting a new person, remember that you are not the only one who is meeting someone new.
They are meeting you for the first time as well, and more chances then not they are feeling just as nervous and anxious about the first date as you are.
We should not judge our chemistry and comfort levels by just our online correspondence.
Most of us have experienced extreme nervousness about that first meeting. One of the main reasons we get nervous is because we worry about what the other person may think of us.
Be sure to not only tell them where you will be, and what time you will be meeting, but also be sure to tell them who you are going to be with.