I am fearful of social situations and avoiding people all together

Overwhelming fear, social anxiety and depression are especially painful because they make behaving constructively a challenge.  But there are also lots of examples of folks who have successfully worked their way through this.  So there is hope!   

In addition to the suggestion to visit your doctor (who may prescribe a medication to help you relax), there are many social service agencies who provide free counseling or take medicaid.  A good CBT therapist will help you look at your thinking so that you may see how you are distorting your thoughts.  

Behavior is also important.  Despite how you may feel: it is helpful to go out, to do things that relax you (maybe a yoga class or a meditation class?).  Exercise. Diet. Eat well. Think back on the things that you used to do that helped in the past, and force yourself to do these things again.  I know that this seems hard, but it beats the alternative, doesn't it?  

Of course, I recommend you pick up a copy of my book, Living Yes, which will help you look at these and other ideas to help you out.  I hope you get unstuck soon!  ~Mark (www.MarkMorrisLCSW.com and www.LivingYes.org)

A good first step would be to make an appointment with your primary care provider & discuss your concerns.  They would have resources available to help in your particular situation.