I can't trust anyone in the group home my parents put me in I only trust those outside the group home

Ever since I was put in the group home by my parent's I stopped trusting them and I grew less and less easy to open up and be willing to trust anyone in the group home after being betrayed and I always had my guard up 24 hours a day I always put up my defenses and always watch them with a careful eye expecting to be betrayed again and I eventually started to only trust those outside the group home I couldn't trust anyone inside the group home I had to put my trust outside the group home and put my guard up all the time inside the group home