My dad keeps following me!

Chileè

I’m a 21 year old woman, I still live at home but every time I go out on the weekends to see my fwb my dad keeps following me. I’ve told him not to as it’s a lack of privacy and respect! But he keeps doing it and when I come home he treats me like shit but won’t talk to me about it. I’m so angry I don’t know what to do?

Advice?