Welcome to the forum. I was reading the posts here and this one line jumped off the paper for me:
Originally Posted by Faye
because he has a very bad temper that scares me and makes it hard to talk if i do.
This does not a good relationship make!
The whole polyamory thing isn't even relevant. You should simply never have to be afraid of your partner! He may rain on your parade every now and then (nobody is perfect), but that's it.
If you fear his temper, do what is best for you
and bow out of this relationship with love sooner rather than later (when things get ugly).