[Mindfulness.]

Hi there,
I'm sorry to hear what you're going through at the moment with your Dad.
It does sound like it could be emotional abuse and it is unfair that he threatens you with suicide, especially since you are still so young (however, it's never OK to do this, regardless of how old you are!).
Is there anyone at all that may be able to help you escalate this further since your school and DCF isn't willing to help - that's if you wish to do so?
Over time, this will affect your mental health even further and by talking to someone about it will help you and your Dad in the long run.
I hope this helped and if you ever need anything, please let me know.