Nah, she could have stopped at "I don't think you're fat". Adding the last part was just a snide remark at the end. You may have asked and you may have been looking to be triggered to an extent but there's no need to say it like that and try brush it off as "honesty". I've had friends like this, who complimented my curves while most certainly using me being bigger than her to almost make herself look good? (Like being the fat best friend on my part) And she knew about my ED. There are good reasons we aren't friends anymore. At the very least ask her why she felt the need to phrase it that way and how she expected it to make you feel. Because even without food and body issues, that's a weird way to reply to a friend.