If someone acts irrationally and cuts you off is that borderline or schizophrenia or depression?

[Meg]

This person takes very small things like I wrote something he didn't like on FB and he said we would never be friends again. He is acting very strange.

[Frank]

That's too little information for a proper diagnosis.

Let it go. Move on. Don't get drawn in to his disorder.

[　☥♡☮　]

all you are implying, is that you stated something; unknown, and from that statement, the other person disapproved, and stopped contact,

so some variable is in conflict of interest to other or both parties, you are not who they thought you were, and thus, they are no longer who you thought they were

..