she smiles And, you two are back on fire and the cockblock next to you should at this moment feel like shit and either leave or (if he stays) becomes a very annoying pest (unattractive to your girl). Hot girls in general are more social because society is more accepting to them.
Her: This is my friend X, Y, Z, Now there is a common understanding amongst all three of you that the guy in front of her is just a friend and nothing else.
You can even go further by complimenting the guy and overtake the conversation by making him talk to YOU instead of your girl: she will lose interest because now he the cockblock is seen as the third wheel to your party of two.
One of the best ways to get rid of the guy is to get rid of him completely by making it about YOU TWO.
Find an opportunity where youre able to talk to the guy on a one on one basis. You: Watch out for my girlfriend, I wont always be around but if a guy goes after her, just watch out if you know what I mean? What this does is hell start becoming the insecure guy because he will start claiming her when he pulls her away from guys trying to pick her up.
And basically say this: You: Yo Friend Cockblock Cockblock: Yeah? These are the worst cockblocks because they dont care about you at all.
It can be incredibly confusing and painful (which is why I created an extensive guide with all my best advice on how to get over a breakup for men).