I know I must have sounded harsh- but this has been my experience in the past, and the parents thought their child was NOT self-centered either.
Get her interest in something OTHER than 'me me me'
And, it's often paradoxical.
If, rightly or wrongly; with reason or absolutely near none . . . a young person has merely 'insufficiently' *****FELT***** [MAY OR MAY NOT have a LOT to do with TRUE REALITY from the perspective of those around said individual] IF THE PERSON HAS FELT INSUFFICIENTLY HEARD or BONDED with; CONNECTED with heart to heart over a significant time period . . .
then they will tend to consciously and/or unconsciously behave in whatever ways get the most attention UNTIL WE BEGIN TO FEEL THAT MAYBE WE DO EXIST, BREATHE, TAKE UP SPACE; HAVE SUBSTANCE, and maybe even are worth something
after all.
AND UNTIL that desperate very common human need is very significantly met; until those maybe never filled buckets are mostly or at least more filled
it is HIGHLY UNLIKELY that jumping through all sorts of hoops and directives to get the person to focus on others will work well or very lastingly at all.
YES, IT'S A WONDERFUL AND OFTEN KEY, CRUCIAL SOLUTION to get the person to do that. And it's WORTH A LOT of efforts and creativity to achieve it.
But it's very challenging to difficult to impossible unless the underlying causes are addressed--at LEAST in tandum.
If you've NEVER felt like you were the last whiff's of smoke from a massive pile of an acres large burning garbage dump, count your blessings. But many people have--whether rightly or wrongly and some from the seemingly best of families.
When such a person is feeling rather nonexistent and the extreme opposite of worth something . . . they can't even imagine that they'd ever have something to give anyone and they are likely so depressed they'd have no energy to give anything to anyone with.
imho.