Hey seddit! Need your advice.

For context, I'm in a relationship right now with my girlfriend. She's lovely, I love her, she's my best friend. Unfortunately, things are complicated right now and last week she tells me she needs space and so we're on break at her behest until Friday, when we're meeting up to talk. There's a reasonably high chance that I'm being dumped on Friday.

Fast forward to last Friday. I meet an unbelievably cute girl, we'll call her Rachel. Somehow managed to play a very smooth game and we flirt a lot before I get her number. I texted her shortly after with a "Hey it's seductionthrow44. I'll call you sometime" and she gave me a flirtatious affirmation with a smiley. That was two days ago, but it's still five days until shit hits the fan with my long term partner on Friday. The way I see it, flirting and socializing is ok while on break, but any touching is not ok.

So, my questions are

(1) How can I keep Rachel interested until Friday without doing anything other than flirting? I'm afraid if I ask her to do anything it might turn physical and then I'd reject her and lose the opportunity. Should I text her? Call her?

(2) If I get dumped, like I said, my girlfriend is my best friend. I'll be pretty emotionally unstable for a while. So, if that happens, how can I communicate to Rachel that I'm just interested in fun and not any kind of dating? I'm the kind of guy who always takes girls on "dates", but I feel like this sends the wrong message.