lately my sister has been acting weird. She just turned 17,but shes been unhappy for the last 3 years(ever since our mum and pa divorced) she's been mad and unhappy all the time. she blows up on people for absolutely no reason,and it's getting worse every day. I don't like talking to her because our conversation always turns into an argument. She lies constantly even for the simplest things. She insists there is no problem in her life, but that is obviously one of her more developed lies. What do I do?????
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