Hey everyone. 

I was divorced in 2018, haven't been the same me since. I've tried and date since but nothing has stuck.  Back in February,  I started a new job.  I noticed there was a girl there that, from the back, looked exactly like my ex.  I told my co-worker friend about it and she ended up telling this girl.  The girl messaged me and we talked about that ex thing,  and ended up confessing that she had a thing for me and I said the same for her ( had nothing to do with the ex, I got to know HER at work).  We hung out and flirted basically.   Just a few weeks ago, she got into a relationship.  She confessed just the other day that she still has a thing for me, but the flirting had to stop because it was screwing with her head.  She is 20 and I am 33, we both agree that age doesn't matter.  She likes older guys and I don't like older women, more than a couple of years anyway.

What should I do at this point? I am respecting the fact that she's in a relationship,  but I know I need to get her out of my head.  Its impossible because u work with her every day and I'm not quitting my job, I love it.