How about marital/premarital counseling? I am so sorry you are going through all this, I really amA counselor will help you address, and be assertive, with your fiance. Maybe he will become more assertive in the process. You both need to set some boundaries here, I feel. Are you sure you want to continue with the relationship? Family counseling too, involve his children too.

You did not write too much about how all this makes you FEEL...it might help to express this, I feel...

Hugs to you

Once it all is sorted out, you will feel better, the trick is sorting it all out..