kelli, what good advice you have given
israel, i hope you can find the strength to leave him, he is obviously not making you happy, and you have tried to make it work to the point that you were prepared to give up your family and life in the uk to move to austrailia where his family all are.
your ds doesnt need your dh as a role model, ds will flourish far better if you are happy and around happy people, not someone who shows no emotions
be strong, remember the person you were before you met dh
if he is the sort to try to stop you or make it impossible for you to leave him, it may be best to make out that you are taking a holiday to visit family in the uk then deciding what to do
good luck, and i hope you meet some people there that you can talk to, even if its friendly banter, anything to stop you feeling so lonely
xx