Anon, I am so sorry that your former friends abused your trust, isolated, exiled, and fakeclaimed you. You did not do anything to deserve that treatment.

I hope you will listen to me when I say this to you.

If living and functioning as a system is constructive and helpful for you, then you are a valid system if you believe you are. You are plural if you believe you are plural.

There is no objective metric for plurality.

Medical diagnoses do not have, or even claim to have, a monopoly on all the plurality that exists, despite some discourse that claims otherwise.

No one outside of your head can tell for sure if you are really plural or not.

Being plural is at its core an entirely internal experience, like emotions or thoughts.

No one outside of your brain can objectively evaluate whether your body contains one person or many people in it.

There is no objective metric for plurality.

If functioning as a plural is what is comfortable for you, then you are plural.

And you are welcome in the plural community. You are not appropriating anything. You belong here.