Okay guys, decided to pursue this other girl after breaking it off with my girlfriend. We set up a date for friday. all was good until i text her wednesday with "Hey you" she replies "Heey." I say "whats up!" -No response from her. I text her the next day (thursday) with "Fridays going to be after 6pm. I'm pretty busy before then"

Still no response and our set up date is tomorrow. Does it sound like she's going to flake? I would be a little unamused if she did.

Aaanyways. What should i do about this. What should i say if she just doesn't text me tomorrow? I dont want to come off as needy.

Don't say anything. You've made your move by suggesting the date. If she does reply great. If not then that's it. Very simple.

She's just playing hard to get. Does she know you've broken up with your gf?
To me it's a good sign she's not that easy, or at least plays it right. I agree with AFCtoTheMax, don't say anything anymore.

If she doesn't reply, don't give up but withdraw your attention for at least a couple of days, then try again. Don't bring up the missed opportunity to hang out with you, your life is too awesome to be waiting for her. She'll definitely think you are not bothered if she flakes and wonders why you are so chilled about it.

See, the average guy would either be clingy and all butt hurt if a girl flakes, and/or just give up easily.
You are different, you don't have time to remind her of stuff and you're not crying after her. At the same time you don't give up, you just leave it for a while and then contact her again. You also have a light form of amnesia when she says sorry for missing the first date.

Next time contact her in a light/playful way, I like this example: tell her something like you're off to shop for some new pants and she should join you and help choose a pair, basically prove that she's got taste.

Play it right bro, she wants you she's already told you before.