Is that selective reading? I wrote how to deal with her. Then I wrote to understand that this is not a tragedy, and it should be understood in the right context. The issue seems to be imagined, since a large part of the sob is about the natural situation, and looking at everybody else as having fun-filled, busy lives while she is left out of it all. Thinking this way probably made her view friendships the same way, and it sounds thrown in as well.
So yes, she is going through something so be nice and be a real friend. But don’t eat yourself up over it. It is something that will pass. Just like you grew past thinking you’re ugly you’ll grow past these feelings.