@pigalow
I am really saddened that so many people think most young adults aren't close to their families and just want to get away. What is the point of family if the members aren't friends and support each other? I do believe this is a particularly western capitalist mindset and not shared by other cultures and societies.
The friendship part comes
after they've grown up completely, not while they're doing it. She's doing the breaking loose and finding herself part at the moment. It's normal, natural and right. You don't have DC to create friends for yourself. You have DC to create a family, which includes giving them the skills and space they need to get out ini the world alone, then you hope that you Iike each other enough as adults that they come back to you as friends.
You type of attitude is what's behind all the tense parent/child relationships that exist, the parents won't acknowledge the DC are now grown/growing up with their own lives, that the DC don't have to do whatever their parents want/say any more and owe their parents nothing. You've done a good job upto now, that's why she's so independent, don't screw it up now!
Its not an equal relationship until they reach adulthood. Until then it's one way, with you supporting them. In adulthood you become equals, which means respecting their opinions and preferences and not treating them like a child or disapproving openly of their choices etc, because who wants friends who do that?!
There's nothing wrong with her, she's not depressed, she's got enthusiasm enough for her friends. Their Christmas plans are fab!