dmatter said:
also how do you react whenever she tells you stuff like i miss you mwas calls you baby. stuff like that
if you tells you she missed you just say "I know"

and ****y & funny stuff like that. Since you see her for an unhealthy share of time (work + outside work is too much and dangerous for a relationship) you need to try your best to still remain a mystery to her and not have her known everything about you. Girls get bored of you fast once they think they know you and got you figured out.
dating coworkers is a known red flag but you only live once. For many of us dating doesn't come often so take whatever chance you get if the girl likes you, coworker or not. Just know that once this is over and you have to put up with seeing her around everyday it is going to be halla uncomfortable and it will make your days hell if you still haven't totally gotten over her.
I was in this situation and even worse since the girl was hot and a flirt. I wasn't totally over her and it make me feel jealous and i felt like s____ for a couple weeks having to see her everyday and watch her flirt with every guy out out there. Of course the only remedy to this is to see other girls cause that's what makes you forget past ones so in a way it helped to push me back into the game. So just remember that it feels good but because this is a coworker it will probably be worse after the breakup than in a normal relationship for the simple fact you will have to put up with seing the b|tch at work everyday.