How do I tell her "Don't date him!"

Answer by  noosh (673)

All you can do is point out some characteristics that may not be very desireable. This will be a starting point.

Answer by  belle39 (966)

Tell your friend or relative why you believe that he's not right for her. If you notice patterns of jealousy and insecurity in his behavior, mention this to her, and say that you're concerned that his anger can lead to worse incidents such as physical attacks towards her.

Answer by  aofia (154)

Tell her what you see could harm her and some of the characteristics you notice will not be benefical for her.