My sister is out of control?

my sister who i love very much is acting well lets just say not as good as she is. she messes around with the worst type of people- druggies, ex-cons, adulterous men, users liars just the worst types of human vermin. my sister is better than that plain and simple. she has the biggest heart of anyone i know and would do anything for the people she cares about. but she is too trusting and nieve, and seems to have no sense of self worth. i need help to show her how good of a person she is and that there are alot of good people that would actually appreciate who she is and hopefully help or she could find a man who deserves her. i know the whole 'give her space shes an adult' let her live her own life spiel, but come on shes my only sister and i love her and want her to have a nice happy life. but shes kinda dumb and needs help. and so do i, so lets hear it people!