Ok now your getting yourself into a horrible pattern of "How should I speak to him, what should I ask, how should I act" routine and you need to stop it.

You need to be yourself and not question every move your making. If you wanna ask about Vegas than do that. Do what you would normally do.

Don't try and be something that your not ie - cool, nonchalant, effortless - if you are not naturally those things. Just calm down and be yourself and let us know how Tuesday goes.