You said you had abusive family, I guess you still live with them? Make as much distance you can, they just cause pain. Treat them like neighbors. Don't share everything talk only about boring stuff. They don't care about you that's why they were abusive in first place.

Most people had good childhood and will never understand the pain abuse causes and will look at you as weird - fuck them. Then there are evil people who prey on abused people to cause more pain, trust your instincts if something is off about someone then make distance don't risk it. Abusive people are everywhere.

TLDR: You're heartbroken from family and not recovered yet, that's why you avoid socializing. Watch for abusers at work.