Do you pay attention to how the guy interacts with the waitress on a date to tell what the guy will be like in a relationship?
Do you pay attention to his relationship with his mom?
Any other interactions with specific people?
What do these things to you about him, and what are some of you red flag warnings?
Do you pay attention to his relationship with his mom?
Any other interactions with specific people?
What do these things to you about him, and what are some of you red flag warnings?

Updates:
Do you think that if he treats her that way he would do the same to you in a relationship? Or do you just not like it in general?