How do you build a support network when you have no friends and your family has disowned you
Cut yourself off from the internet for starters. Do you like hiking? Take up hiking. Fishing? Do the same. Paragliding? Why not? 3D chess? Go for it sicko.
You need to find hobbies and join groups for said hobbies. 4chan is not real. Also, these things will make you more independent. Throw your modem out the window and get a dumbphone.