Dear Sasha, 
“I am desperate. My 20 year old daughter won’t interact with us much. She only wants to socialise with her friends all the time. She is constantly hooked to Netflix including dinner time at the table when all other members are having a family conversation. If we say something, she gets angry and goes to her room. She does everything based on impulses and does not think about consequences at all. We have been putting up with this, thinking it’s a phase that will pass. But it has been going on for over 2 years and to make matters worse, she has started posting pictures of herself on Instagram that are not in good taste and her friend told me that she has been engaging in intimate relationships with several guys off the dating sites. Please help!”
Dear Friend, 
Bless you! You have in fact been going through a lot with your daughter and I can understand it is a very difficult situation. From everything you are listing above, it feels like your daughter suffers from Emotionally Unstable Personality Disorder (EUPD). The typical symptoms of this disorder are: Feelings of emptiness, requiring external validation all the time, impulsive behavior, sexual promiscuity, emotional dysregulation to name a few. The good news is that there is a huge body of evidence to suggest that regular therapy can control all these quite well.
I would recommend that you first get a psychological/psychiatric opinion first. In person diagnosis is critical. Dialectical Behavioral Therapy (DBT) generally starts working right from the first month.After the diagnosis, please read up on EUPD so that you can understand what you are dealing with.
All the best.
Much love