what do I do confront her tell freinds and family that she is a user, please help me, my initial feeling was to hide it but now I think maybe the more peolple that know the better they may help her to realise it is a living death
You should let your friends and family know. Heroin is a serious addiction (MUCH more risky than a lot of other drugs), if you don't tell them now it might be too late.
get her help they have groups and rehab and cleansing centers but honestly she'll only fully quit once shes ready. and i would say you could try to scare her by taking her down a street where the drug addicts are and ask her if she wants to end up dying cause the herion gets more important than food and a house and if she wants to lie to the people she loves and steal from them to pay for it because no job will take her because she failed a drug test. And if nothing else and all else fails like she wont admit herself to a help center or she is underage and she wont stay clean take her to the police station and let them know she is a user and they will take her into custady and make her get help