<human>: Can you provide a brief rundown of the text in within 3 sentences?

Longtime lurker using a throwaway but, here we go. 

So ten months ago I've got a "buddy" (we were more like mutual acquaintances) of mine from high school asking me to help get his gf of three years a job at the restaurant I work at. I oblige even though I've met her only once briefly before this and she is hired a week or so after. 
It started off normal to be honest, she trained along side me as a waitress for many of her shifts.  Soon after I was promoted to a management position but still worked along side her and the other servers. 
"S", I'll call her was genuinely nice, caring, funny, smart, gorgeous and it's understandable how I could have crushed on her at first but then for me it took a complicated turn. S and I would talk outside of work occasionally  only over text/social media , nothing too serious just comments about work or funny things I've seen on reddit that I'd know she would enjoy. Then our conversations turned to deeper subjects fears, life goals, the occasional fight S and her bf would get into, and my feelings grew exceptionally the more I got to know her. 
Though she  is still very loyal to her boyfriend, which I respect and admire, I've yet to tell her how I feel. Now I find myself feeling ways for her that I've never felt with any other girl I've met. I've completely fallen for her and everything about her. And logically I know it's stupid. 

I just need advice on what to do, clearly I'm not quitting my job and I won't make her quit. Should I tell her?
<bot>: Im in love with a coworker  of mine who has a rocky relationship of three years. I'm a manager and she's a waitress, how do I go about this?