Girl's Behavior

Should I play hard to get?

I have a huge crush on my coworker. I'm pretty sure she feels the same way too. We've worked together for about a month 3 days a week and are all alone during our shift. On our down time, we constantly flirt and joke around. Usually she initiates the conversation by asking me questions.

She laughs at all my corny jokes (she said I was super funny), whenever I look at her she has a huge smile on her face, I catch her staring, and once she even asked if I had a girlfriend! The sexual tension is extremely high. One day I slyly asked for her number "just in case she needed to ask about work." she also asked if I used Snapchat, and we exchanged usernames. We usually send each other snaps every night.

Sounds awesome right? Well the other day at work she seemed a lot more aloof than usual. She still initiated conversation and laughed at some of my jokes, but I got the sense maybe she might be losing interest. She said she was tired, but I suspect I may be making myself too available to her. Maybe she needs time to miss me or something...

I'm thinking of cooling it with the contact for a while. However, I'm also afraid if I use this tactic, that I might seem aloof or disinterested to her, which isn't something I want. I will admit it will be hard to ignore her even for a few days, she's almost all I think about. I plan on wooing her as usual in person, but cutting back on the snaps for the time being.

I guess my questions are: Does it sound like she has a crush too? Is a guy more attractive if he's less available? Should I play hard to get or just keep doing what I'm doing?
Should I play hard to get?
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