Sorry for not replying sooner sweetie
Did you send the email?
The fact that you spent the time to write that email, shows that, even if its on a subconscious level, some part of you thinks that it probably should be sent, or at least...that something should be said.
I think the email is really well written and, if anything, at least it brings to your dads attention that youre worried.
Can i ask...do you think your dad knows? ...or is he just trying to work out why things are so wrong?
Its your decision what you do though, I cant even begin to understand how difficult this must be for you...
Im sorry i couldnt be much help
But im here for you if you need anything