I called her yesterday, she texts me back today saying "Hey you! sorry i mised your call last night. I'm not gonna lie. I was totally on a date. Whats up?"

what do i say to that?

Now you dont answer cca 1 day... and say you were "tottaly" doing something or was somewhere...

whatever that "tottaly" means for her lol

Something along the lines of "Nothing really. I was out with some friends, having a good time, thought you might want to join us."

She's playing a high-value game with you. Play it back and don't let comments like that faze you. Depending on how far along you are, you might want to neg her for it ("A date? Haha, who'd you bribe for that one" etc), but skip it if you're past that stage.

Another trick might be to act really happy for her and tell her that you hope she found the perfect guy for her (and if not, you actually have another guy in mind you can recommend to her -- but don't word it in a way that she thinks you may be referring to yourself). That's a strong IOD that could stun her into chasing you again if the timing is good for it.

Yeah, to echo what the post above me says, I think it's important that you don't show her that her comment fazes you in any way. She could have just as easily left out the fact that she was on a date, but she specifically mentioned it, so she's probably trying to see what kind of reaction she can get out of you.

Geeze man... not to be harsh... but who cares.

Just text whatever back. If you waste time mulling over one text here and there you're having the wrong attitude.

Trial and error. Just throw her some fun vibey text back.