So i i did the text opener and all responded and reacted the same example is:

ME:Guess What??
HB: what??
ME: Can you keep a Secret??
HB:Yes tell meee
ME:Promise!!
HB:Yesss come onnn, Tell me
ME: Prove it!! Tell me a secret, so i got something on you
HB: No!! i cant think of anything. Tell meeee


Is it best to just not respond. And just text again a couple days later new opener, because i know that psychology of curiosity is that it is rarely ever satisfied because it is created by deprivation. Also not giving in to her commands. Or should i come up with something

How about drop the bullshit and just say "Hey, let's head out tonight."?

I don't have time for that until the weekend. I just did this to create curiosity and then on the weekend set something up.

So just looking for advice on the text

I agree with GameSN. Say something trivial that is not a secret. That's humor, build it up to be this big thing and then say something not big.
Her: tell meeeee
You: Okay ready miss whiney pants?! I'm going out Saturday to XYZ and you're coming with!! Shhhhh, don't tell.