The comment you made was harmless and just implying you will miss her. She over reacted, as did you with the other post on here calling everyone freaks.
This reminds me of a situation a while ago at work. A lovely lady had joined the office, very polite and friendly. Another lady in accounts who was slightly sensitive about her weight (although not really that big) took offence to a very harmless comment that resulted in the new lady losing her job. We had one of those charity sweetie boxes and the guy came in and gave the 2 of them a packet of nearly out of date sweets to share, she ate them all so replaced them with another packet in the friends draw with a note, saying, for being a pig (meaning she had scoffed the first bag of sweets and calling herself a pig) but the other lady decided she had been called a pig and refused to accept the new ladys apology, it was a real shame as this lady was such a kind person and it really wasnt in character for her to be mean.