<human>: My friend and his girlfriend dated for 1.5 yrs and split up for a month three months ago. During that time she hung out with a coworker of mine, which is normal. But after my friend and his girlfriend got back together, my coworker keeps coming to me saying the girl has been hitting him up a lot. They hung out once to smoke and he said she was being super flirty.   I felt like I needed to say something to my friend? But thought it would be more reasonable to ask the girl.  I texted her about it, and she was pissed saying it's not my business and the coworker can ask her about it if he wants, and to not talk to her again. I feel like I'm in the wrong for getting involved? But I'm worried about my friend and want the best for him.  What should I have done differently and/or what should I do about this situation?

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<bot>: Cowrker keeps saying my friends girlfriend is hitting on him and I asked her about it, but I'm not sure if I should have just ignored it and let it play it's course or just told my friend.