Diagnose this persons mental disease....?!

Diagnose this persons mental disease....?

Ok here are the symptoms...

1. This person has no remorse for ANYTHING
2. This person will go out of his way to get someone in trouble or hurt them....but for no reason at all
3. This person is obsessive over his boyfriends and never leaves them alone
4. If they reject him, he stalks them....and even tries to get in touch with them through their family
5. If he gets rejected by anyone at all....it's the same thing....he obsesses over it for weeks or months....and also tries to get them in serious trouble
6. He is rude to people, but abnormally rude....to everyone...for no reason
7. He is always trying to change, gets an idea, goes full force into it, then will just quit...

I'm sure there is more...
By the way, this guy is gay and his family will disown him if they find out.....

I really need to know what is wrong with him....

As a Mental Health Therapist, to me this person sounds like an Anti-Social Personality with some Borderline features. However, a qualified doctor should do testing to recommend a course of treatment. That said, however, the prognosis for someone with Anti-Social Personality Disorder is extremely poor. These people don't see anything wrong with their behavior even when it gets them into trouble. Borderline is a little better in terms of treatability and generally lessens as the person gets older. This person should get treatment ASAP.