Why did my friend start attacking me for no reason?

I was literally shocked. She called me to get together and i said she could come over. I prepared some food, bought some wine. She came over and the first hour was fine...then she asked me if i got my hair dyed and i said yes and shortly after the question i remembered and told he how one of the guys there flirted with me. ( she knows of him herself) to that she replies...” DO YOU GET OUT MUCH? CALM DOWN!!!!! Did he invite you for coffee or something?! I think you’re in love with him! I was so shocked ... her tone seemed very snappy, angry and out of place. I was just randomly telling her about him being all weird and flirty but shes married herself . She knows of him but never met him . What was that all about?