Life is going to require you to speak. After college your going to have to get a job, go on interviews, talk on the phone, meet your gfs parents... The earlier you stop running from these situations the earlier you won't be living with anxiety like you are now. Seek some professional help. The 2-week intensive program at AIS helped me overcome some initial barriers. You need to get out of your comfort zone - that is the only place growth happens. Yes there will be times you have to speak in college and that is a good thing.