Hello! I've had SA my whole life, and full blown agoraphobia amounting to 1/8 th of my life. At first it's great to hide away from everything but then the loneliness...omg the loneliness.
everyone's different right, but I'll tell you what helped me. i took part in a mindfulness for depression and anxiety study at a local Uni, but i guess anyone who offers this would be great. Getting there was difficult, but i used small amounts of anxiolytics the first few times. This was a life changing experience for me.
Started volunteering... again very difficult but used aniolytics the first couple of times until i got over my fear of lots of people.
The local dog park has been amazing! obviously helps if you have a dog...lol.
Am guessing since you have a diagnosis you probably have a medico? if not, speak to one (GP/psychiatrist) and try anti-depressants
I've life long bi polar and am medicated, but the meds aren't great. i use aerobic exercise to kick the dog to the curb. i run or cycle (i started with fat paced walking). it's truly been a blessing for me.
Good luck, thanks for asking for help and allowing me to ramble at you. I'm suffering a bit of loneliness myself ATM, but is very fluid and situational. i know it will pass.