What do you think about this? is it bad? is it wrong? did i do the right thing?

I think you leaving your brothers house was the best thing and you made sure his fiance was ok also. I wouldn't be so sure about him not hurting her if he can hurt you he can hurt her. Don't be afraid to show a little emotion. Men think that holding in their emotions makes them more of a man but I like men who cry sometimes. Not like crying all the time but showing a little emotion. Your brother sounds abusive and if I were you I would just stay at your step moms house if it doesn't cause a big scene for everybody, and does your step mom know what your brother does and how he calls you names? If she doesn't she should. I hope things get better for you.