Why do people avoid people?

It's strange, when you do attend a social, some would rather avoid people then feel uncomfortable. I thought when I did attend one where i hadn't met up with people for some time, it would be one of acceptance and catching up; instead the two responses that sounded forthright was "we do work you know." Yes i do understand this but i thought we could share other topics of conversation, like movies,kids, food,ideas, parents etc..and the other was " I don't like the posturing and posing." I don't get it, firstly i wasn't posturing or posing and i'd really just like to know you better, maybe in some way i could be a blessing. Well at least the pizza party was more loving. Maybe i just need to show more love and thoughtfulness. Will pray for more wisdom.