<human>: have a simple job of hosting and or bussing at a restaurant, I taught this girl how to do so as well. I expressed no interest in her as many employees I train I don't see often or do they stick around long. 

Out of several coworkers I am the only one she hugs, we always laugh most of our shifts together and she asked a few times to hang out. I asked her for her snapchat and found out that the "best friend" she occasionally mentions is a 25 year old straight single male. She very recently changed her social media profile picture to him (25M) kissing her on the cheek after going on a vacation alone with him. Many of her friends tell her he likes her openly of  social media. This is a lost cause for me right? Do I talk to her about it(just gently bringing her best friend up sometimes to see) or steer clear of her.

Could you distill the essence of the text into 1-3 sentences?
<bot>: coworker expresses interest in me however I find out that her best friend is a 25 year old man. Should I talk her about it or avoid it completely out of respect to the man putting time into her.