I can see that you are concerned for your cousin and would like to do whatever you can for her. Your concern here is valid, at the same time it is very difficult to manage the situation since your cousin is not ready to take medication.Before reaching the stage of being able to counsel her, she first needs support of family members, If they are able to support her and make her feel comfortable, she may open up. At present she may feel that no one understands her, so she prefers to stay alone. You could try to approach her in the way she is comfortable with, such as try to do,involve yourself in activities that you know she likes and that may make her feel like doing it, at this stage your aim is not to counsel her, your aim will be to first make her feel comfortable with you.other family members. Only when she is beginning to feel comfortable ,other approaches can be tried, This process may take time, patience is required. Hope you are willing to give a try.