bored
not bitter but bored
ok bored i usually agree with your advice, but that just seems lame. nothing wrong with saying you had a fun time. if the guy thinks he has all this magical control just b/c you told him you had a nice time, he has mental problems.
No piece of advice will work for everyone. If a girl gives me a simple text like the one you suggest, it makes me feel like she's fishing for a second date. I like a girl who is creative. I once sent a text message to a girl telling her we were going to take over the world. She sent me an email with a full plan to take over the world with vegetarian cupcakes and embedded a bunch of graphics of weird food products and Pinky and The Brain and it was a riot and made me feel like she was fun and unique. It completely made me WANT to go out with her again.
I was on a first date with a girl and she had to run to the store real quick. Five minutes after she left I got a text that said, "Miss you already."
A little soon for my taste. I would have preferred a text that said, "Hahaha.. and you thought I was coming back "