The context of the following conversation is Alex was nervous about what he was going.  He looked over his shoulder.:
Alex says I am really nervous about this whole thing. Who is that behind us?.
The friend responds Don't worry Alex, that is just my friend. I invited him..
Alex responds Why would you invite him to something like this?!.
The friend responds Don't worry man he's cool. I've known him for years..
Alex responds Gee I hope you're right man..