That's tough, man. :/ I know how you feel. But unfortunately, if she won't tell you what's wrong, there's not much more you can do. Just be there for her.
Nobody could tell you how he will react. But I agree with Amelia. Would you forgive you? I really hope you learn something here.
She is your great niece.
Yeah, he has no relation to you. Obviously that's not to say he's not family, but there is no title for the relation.
They're all right. We always change. But it's not something to be feared. Look forward to it, it's a part of growing up and maturing. :)
It's hard to say really. If media wasn't pushing this image, the pressure would still come from somewhere else, most likely.
If you mean why they tease girls and laugh when they say something funny, it's to try to make her comfortable. The best way to get someone to be comfortable around you is to laugh with them.
That's kind of rude. :/ And if you're asking if the phone company will allow you to check his txts and stuff, they won't allow it.