Gym receptionist is flirting with me !!!!

I go to the gym regularly and this cute receptionist works there. Whenever I check in I always greet her with smile like the routine. One day, she gave me that look - you can understand it wasn't normal look !

After few weeks, I had to renew my subscription and she was all smiley kind of... I didn't pay much attention to it since it was just part of her job to be nice to people.

One day, after the work out, I went to ask for a towel which is the normal of the gym - and she kind of started talking to me ...Oh.. it is you,..I thought you come to give some money...! ..I think she wants to talk to me by starting small talk here and there...what to do ?

What

Updates
+1 y
I met her in a mall and it turns out that she has a boyfriend . we talked a lot but I had to cut it short since I was in a hurry. We met accidently on several times.

Whenever Iam done working out and wants to stretch, she comes to me and talks to me even when I have my earphones on : one st day, she came to me straight as I was stretching and she said . I will step on your back ! second day, she came to me closer and put her right hand next to mine saying she was almost brown like me.
Gym receptionist is flirting with me !!!!
Post Opinion