The continued avoidance of that which you fear is effectively worsening your social anxiety disorder. Removing yourself from an anxious situation is reinforcing. It makes you feel better. Feeling better is a “reinforcement.” The first law of behaviorism states that “if a reinforcer follows a behavior, then that behavior will increase in the future.” In your case, that behavior is avoiding social situations.
For instance, take the example of your being frightened to go to the mall. It probably happens this way: enroute to the mall, your anxiety builds. By the time you arrive, your anxiety is severely heightened. The severe anxiety makes it difficult to leave your vehicle and you ultimately return home instead of going into the mall. Upon leaving the mall, your anxiety diminishes significantly and by the time you arrive home, your anxiety is virtually nonexistent.
By leaving the situation at the height of the anxiety, you have made your social anxiety worse. Ideally, you should have gone into the mall despite your high level of anxiety. It would undoubtedly have been difficult to “sit with” that high level of anxiety but it would have eventually diminished.
Without treatment, social anxiety disorder tends to become worse. At this time, you find it difficult to leave home. Social anxiety is negatively affecting many aspects of your life. I would recommend seeking professional treatment. Very effective treatments exist for social anxiety disorder. Choose a mental health professional who specializes in social anxiety disorder. You may also want to choose someone who has specialized training in exposure and response prevention therapy, which is a specific cognitive-behavioral therapy designed to treat social anxiety disorder. You are a perfect candidate for treatment. I wish you the best of luck. Please take care.