Here to Make Friends?

Found this video on ThinkChristian. IIt's demonstrates a common cliche in reality tv: the "I ain't here to make friends".










What it makes wonder though is whether this isn't just a reality TV thing. One of the girls above says that she already has enough friends and doesn't need anymore. I wonder if there are times when I'm just civil to people but deliberately avoid anything deeper then an acquaintance. If I am, which I'm sure I am in at least some situations, how am I missing out?