Yes, and not at all.
In other words, yes, I am still interested on a trip to Seaworld on the 11th (I'll have to square it with work first but this is a quiet time).
And I don't mind at all if you friend me. In fact, then I can truthfully say a friend is visiting from overseas. ;) You don't need to ask to friend, but then I hope that people don't take offense if I don't reciprocate.