I was 'friends' for a couple of years with a jellyfish and always came away from our meet ups feeling down and not great about myself and wondering why, until I cottoned on to the jelly fishing! The comments were so small and subtle, and disguised as a compliment, but were actually barbed and acidic and designed to make me feel like shit!
One day we were talking about uniforms at the schools our DCs went to and I said something along the lines of DD's blazer being washable and was her DCs school blazer washable, and she sort of did an eyes narrowed, head tilty "Aww bless" expression and said something along the lines of "No, theirs aren't washable, but they go to a good school".
Plus there were always loads of comments about my youngest child, making out that he was some kind of dunce and that her youngest, of the same age, was some kind of genius. And the comments about my appearance, dressed up as friendly, caring concern: "Wow I can't stop staring at the dark circles under your eyes, are you sure everything's ok and you're not ill and that you're getting enough sleep?", or "Ouch, that spot looks awful and so sore, bless you trying to cover it up like that, all that foundation caked on it, you've tried so hard". When it'd be a tiny little pimple that I'd not even noticed and had just put my foundation on as normal!
I ditched her BTW!
Come to think of it, a family member that I cannot avoid is behaving more and more like a jellyfish towards me at the moment, with lots of put down comments about my clothes dressed up as compliments. And a mum from DD's school year always used to do it to me too when she saw me on school runs, still does if I see her in town and haven't hidden to avoid her!
I think I must just be a Jellyfish-attractor!