Re: If she says "You're too sweet:)"
not too bad, but by telling her if she was there with you that you would have a better time implies that she has high worth to you. Which is cool and everything but you gotta ask yourself...would I still have a good time if she wasn't here? The answer is yes.
If it were me in your situation I wouldnt reply, because what else is there to say? You told her it'd be fun if she was with you, she got the memo and replied.
-"Dependence is only a state of mind, Independence is a state of being, because in the end all we really have in the world is ourselves"