Most Helpful Guy
I would put money on the fact his new GF would either be disapproving of any other girl getting near him and he knows it. She is likely a control freak, insecure, insane, or has him totally whipped. So when she isn't around you get to see the real side of him and when she is nearby you get the scared guy on a short leash version.
Base your opinion of him when his GF is not around, when she is around, don't even bother going near him it is only going to bug you.1