<human>: Provide a brief overview of the text.

About 6 months ago, I [27m] hooked up with a coworker [24f] at a party.  I knew she liked me, but I made sure she knew it was just a fun thing, no commitment, etc.  I made sure she understood.  She seemed perfectly ok with it...until about a month ago.

Our work schedules ramped up, and I started pulling a lot more hours, which meant that I put my social life on the backburner.  She began to complain about how we don't hang out anymore (we used to go grab lunch with other coworkers, or go out for happy hour).  I explained that I've been busy working, and it seemed to placate her a little bit.  I skipped out on her birthday party because I was out of town...and it seemed to raise some sort of hell.  I woke up the next morning to 17 SOBER texts.  I replied that I was out of town (she knew I was), and then a week later, I get messages over and over again.  5 - 10 a day.  All saying how I don't care about her, how she misses me, etc.

I asked her politely to stop, that she's a good friend, but I've been busy, but she really needs to relax a little.  Then it went into a 20 some odd text message novel about how I'm just throwing away what I had, how she wants things to be normal, etc.  I told her that I'm going to stop replying, because she's making me uncomfortable, and it turned into her calling.  

I REALLY don't want this to escalate, because we work REALLY close together (literally next to each other).  Is there something I can do about this?
<bot>: coworker and I hooked up once, seemed to understand it was just for fun, nothing serious, but is now going a bit overboard.