Left Off the CC Decoder

You found out you were left off an email thread and now you're spiralling. This tells you honestly whether it's worth worrying about, what it most likely signals given your relationship with the sender, and if action's warranted, the exact words to get back in the loop without looking paranoid. For the small slight that might be nothing, or might not.

I was left off this email chain: {EMAIL_CONTEXT}. My relationship with the sender is {RELATIONSHIP}. Recent dynamics: {RECENT_CONTEXT}. Tell me honestly whether this is worth worrying about, what it most likely signals, and if action is warranted, exactly what I should say to get myself back in the loop without looking paranoid.