<human>: Can you provide a brief rundown of the text in within 3 sentences?

Rewind to a month ago, she and I went shopping and tried on clothes, normally we go into the same changing room ( I don't know if it's just us that does this) to try on a couple of outfits together and I'm quite Lanky, ( long legs , broad shoulders, and a small waist) and imo she has the perfect body shape Nice hips , perfect shaped body imo . Anyways, I caught her tugging at the skin of her thighs and tugging at her stomach and  she then said to me " I wish I had your body" I then reassured her and made sure she knew she was perfect the way she is and how beautiful I thought she was. But she just seemed to ignore my reassurances and she seemed kind of down for the rest of the day.

Anyways lets Fast forward to today, I was just regularly on my phone playing a game , now when I get notifications they kind of stick at the top of the screen and you have to press them to get rid of them , so I was playing a game and I got a notification saying my facebook friend [Her Name] joined Instagram as [Anagirl] (I'm just using ana girl as an example but Ana is a nickname for anorexia). 

So I clicked on the notification to go and follow her and my heart sunk, even though her page was private you can still see the description and profile picture, I saw cuts on a wrist as her profile picture and the description had her goal weight and current weight, but then I was just thinking  why she didn't tell me about this and why she wouldn't trust me with these kind of things because we always share our secrets with each other, maybe I'm just being paranoid I just don't know anymore.
<bot>: Friend accidentally connected her facebook to an anorexia account and I'm worried about her and how I should approach her about it.