This sounds like it's a fear of being rejected. However, even though I'm sure you guys are aware of this, pushing people aside won't do anything. You have to accept that people can hurt you, but in the end that we, as people, need companionship. We want people to be there for us and it's likely that fear that has us pushing people away, so that we dont' lose them. In the end, I guess it depends on you. Is it better to have love and lost than never to have loved at all?