It was not fine, and Harry knew his sons far too well. Only Al wasn't nearly as good at pretending as his brother.
"Al," he said. "Don't pretend with me, your brother does enough of it for the both of you, and no, James' mates are not good enough. You need friends of your own. You're quite brilliant yourself, you should have more friends."
"And one of them shouldn't be Snape. I would hope that I haven't done such a horrible job that you'd need a new father figure in your life."