Part of me says that they sound like normal teenagers.But anxiety and depression can't be ignored.There is lots of help out there and often teenagers will listen more to someone else.No matter how close or how well you communicate they need to talk to a professional.I don't know where you live but in Sydney there is help for teenagers at Macquarie university anxiety clinic and Westmead hosp.also similar help.Both are free.Life line is also a great service and they can direct you to help in your area.Just tap into some help for them and then step back and take care of yourself.
Tonya xx