My life is falling apart

It seems like everything stable in my life has completely fallen apart in the past month. I'm 28 years old and feel completely helpless. The company I work for is most likely going out of business in the next few months. The girl I thought I was going to marry, my best friend for 13 years, left me for another guy. My roommate and only other real friend just told me that he wants me to move out. I can't afford to live on my own as it is, and when I lose my job I'm screwed. I have no other friends I can talk to or even hang out with to try and take my mind off this. I have a social anxiety disorder which makes it almost impossible to go out and try and meet new people. I feel like I've lost everything in my life and don't even know where to begin to pick up the pieces.