<p>I don’t care so much if the young man is nice to me. I try to see if he is nice to my daughter. As an example, when he gets up to get more drinks or food, does he ask my daughter if he could get something for her too (or ask everyone at the table if anyone needed anything). If my daughter is busy helping me in the kitchen, does he come over to help HER out or does he just sit there to be waited on. More importantly (not sure if OP could do anything about this one), when my daughter looks at him does she look happy.</p>
<p>Yes, just be your polite self. Don’t try to be someone you are not.</p>