Your friend (tommy) told his own dad about you, and that you are his best friend, as his dad asked him if you can come in, so his son agreed.

As you came to your friend's house, and having fun at his room, he forgots that he have to go for jogging, he says he will soon come back, so he left you.

As soon tommy was gone, his dad came in, looks at you, with a smile.

Hey, you must be my son's best friend, huh?

He spoke friendly, but in deep voice, as he cross his arms to his chest, and lean back against the door.