I recommend that you speak to your doctor and obtain some type of help. Do you have a diagnosis? If not speak to your doctor about finding you a therapist and start exploring what help you need.

It’s good to make friends and to fit socially at work but that’s not why we have a job.

I recommend that you focus on task at hand when you go back to work. Perform work duties and don’t worry about making friends or if people hate you or not. Stop messaging people unless it’s about work task and you are required to send messages

What line of work is it?