Man, I want peach ice cream, all I have right now is orange sherbet!
She sounds like she might be related to my best friend, who is the Queen of Overthinking. When I first met her, she was so cautious about giving and receiving offense that conversations would sometimes run like this:
Me: Boy, I could sure go for some peach ice cream. I know I probably shouldn't though, I didn't have a good breakfast.
QoO: Well, maybe you're right, I mean breakfast is the most important meal of the day, and you wouldn't want to upset your stomach with ice cream. And besides, we can get food later, right?
....
QoO: You know, I just wanted to let you know, I was thinking about what I said, and I certainly didn't mean to imply that you shouldn't have ice cream. I wasn't trying to say anything about your weight, and I think you're very healthy and don't need to worry about anything like that. And I wasn't trying to suggest that we needed to eat now, we can eat whenever, I'm not picky.
....
QoO: I'm sorry, I didn't mean to be nosy about your personal exercise and diet, that's your business, and I shouldn't be making comments about it.
.... (etc.)
Meanwhile I'm cracking up, because I haven't said Boo in the intervening moments. She's just trying to cover all the bases. She grew up with parents who are poor communicators. I forgive her.

And she has gotten much better in therapy. I think she may even be stepping down as Queen of Overthinking - maybe your Facebook friend can replace her.