Death is a terrible thing. Death also complicates this, a LOT. You must remember that her father just died. I would be very distant if that had happened to me as well. There really isn't much that you can do except give her space. Your best bet would be to mail the card to her and then just give her space. The death of a father is not something that people really get over, especially at your age. Its not like a aunt or uncle that passed away. This was her father that died. Like I said before, just give her space and mail the card to her. I know that it sucks to have to do that, but there really isn't any other way.