How can I trust others?

I (16) can hardly trust anymore. I don't really feel at home anywhere, but always alone. This feeling is stimulated when I'm traveling with people other than my family.

I can hardly trust anyone deeply, I say basic things that everyone knows, and sometimes a few deeper weaknesses and struggles. Because I'm weak, I get the wrong people. These people take advantage of me, others in the group accept me.

My parents are often gone during the summer holidays, they also want me to spend 4 of the 6 weeks without friends. My cell phone should be taken from me. I only get it for the gym or something. YouTube is allowed to a certain extent, as well as Netflix.

Unfortunately, I can hardly be alone because I'm troubled by thoughts that sometimes really take me away.

Thanks man.

With pleasure