Overcoming Social Anxiety: Tips and Tricks

how do I start socializing more without my paranoia and anxiety getting in the way? I tend to worry that the world is out to get me, and the people I talk to have ulterior motives when they even look at me, let alone speak to me. I'm afraid that people's kindness is because they feel sorry for me. no matter how many times I tell myself that it's just my condition I still end up having panic attacks in the bathroom, or crying in public places.