It's attention seeking. She is desperately seeking reassurance that people care about her. Boring she may or may not be...I'd say she doesn't know who she is yet and doesn't have a strong sense of her own identity as a person or much in the way of a sense of self-worth.

It is emotional neediness that is causing this behaviour. Same with your daughter's friend, Lulu. She is frightened nobody likes her and that she doesn't have any true friends.