What you wanna do is just kino her when you talk to her at work. Arms, shoulders, that sort of stuff. Do fun things like throw things at her, take her hand and spin her, tease her, "Why haven't they fired you yet?", and just fluff with her from time to time. Also, you shouldn't be available at all times, you need to keep busy and use body language towards her showing you gotta go back to work, if you start backing up while she's talking to you, if she's really into you you will notice she will start walking towards you while you're talking.
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You could slip drugs in her drink and then tongue punch her fart box when she's asleep
