You can only change yourself

You are not responsible to change and can not change the course of someone else's life, change their decisions, or thoughts. You are only responsible for your life, decisions and thoughts. You can choose to walk beside someone, choose to walk with them in your separateness. But forcing a change is futile, and destructive. It will leave you broken. 
Instead choose to first, make decisions that change the course of your own life, making them in wisdom and keeping self honor in the forefront. And second remember you are never alone. Love surrounds you always. You are loved. Things will progress as they should.