I think a lot of the time the people here are jaded. They've tried everything and nothing seems to work. So they put up their defenses. Don't take it personally. I don't. You know the truth about your life. Try to help the people you can and the ones you don't help weren't meant to be helped. Take it with a grain of salt.
There will be people that listen so don't worry about the ones that don't.
Your paranoia can and will go away. It just takes time and effort. The more you see positive reactions the more comfortable you'll feel. In the end just enjoy your life.