[She could argue various points with him here, but this isn't so much about logic. If it was he could easily stop himself and that would be the end of it, but the end isn't coming that easily or quickly and probably not that neatly.]
I think...you should get out more. Socialize. Join more things. Attend stuff. [Part of her wants to say the exact opposite of this. She wants to keep him and everyone else safe by separating them, but maybe if he knows everyone he won't be able to look at them in a black and white kind of way. She hopes it will humanize them.]