Maybe the friend just picked up on the vibe you were giving off to Kelly. I can tell when a guy is into one of my friends by how he acts around her...body language, glances, etc...
I like to think that adults no longer resort to having their friends ask if so and so likes them back.
I would try to feel it out a little more, see if she emails you at work or approaches you. You could try and ask what she's up to this weekend and see how she responds. Not asking her out but if the girl is interested in you she'll probably throw something out there like, "We'll be at this pub around ten, you should meet up with all of us."
So, so you think you can tell Heaven from Hell,
blue skies from pain.
Can you tell a green field from a cold steel rail?
A smile from a veil?
Do you think you can tell?
And did they get you to trade your heroes for ghosts?
Hot ashes for trees?
Hot air for a cool breeze?
Cold comfort for change?
And did you exchange a walk on part in the war for a lead role in a cage?