I guess that the delay just reinforces the need for you to sexualise your encounters much more then! You must be super flirty, use touch, speak seductively and get a kiss to confirm to her that this is going to he romance not friendship. Your aim is to get her comfortable too to this level of intimacy so make her feel at ease, relaxed and then hold her hand and go from there.
Obviously do this gradually but don't hang around too long otherwise you'll miss your chance (which is often less than you think if she's attractive and has lots of guys going for her)
Be confident - knowing she DOES want to meet you and not other guys she could potentially be with
Once she knows it's more than friends you want then maybe you will even find that she becomes 'available' between work shifts more often
Good luck man