What if capricorn doesn't act what we had seen..

I have a gal friend who date a guy in first decan of Capricorn for four months. He isn't act like any cap man that we had seen before. He was cold and distant a little bit at the very beginning and then they spent few nights together. He is needy and clingy. When my friend left for a two weeks holiday, he called and texted everyday every hour, sometimes he could wrote 20 texts at one time to response one text. Whenever my friend asked for space or time alone, he would be very angry and called her ugly bitch/ slut. He wanted to spent 24/7 together. He has very strong opinion about everything, and always want to win if he think he is right. He likes to control her life and even her friends. whenever he sent general texts to one of her friends, the friend has to reply him otherwise he would ask his girlfriend to send a text to remind them to reply.

I wonder what's wrong with cap man, Is this normal or extraordinary? Thank you!!

He is 29 years old and has almost no friends, he only had photos with his girlfriend in his facebook. Everyone suggested the girl to make a better decision, she complained to everybody about him, but she never plan to leave him. Isn't it true love?