I got a new job 2 minths ago and there is this actual 9/10 girl at my office. We became friends very quickly. First we were just hanging out on breaks, but recently we started constantly talking to eachother. Like at work we're chatting on MS Teams (of all places) the entire day, and then we keep texting in the aftrrnoon. The conversations aren't completely innocent either, we like to tease eachother, but so far it has stayed under the line of direct flirting.

Here's the thing though, she has a boyfriend. That is why I haven't made any moves yet. On the one hand I can't help but get by hopes up, on the other I'm worried I'm on the express way to ultra friendzone. As far as I can tell, she is the type of girl to be very casual about this stuff, and she is friendly with a lot of guys at the office.

So is this normal? Do I just let it play out? What do I do.