Friends as Roommates=BAD COMBO

For years I use to live with friends, or have roommates, which in my opinion, in my past, I had no problems growing up. For years it was easy to get along and nobody got hurt, no feelings, bills were always paid on time and we had a great time as well. These days, things are totally different, and people change and grow up as well. I've lived on my own many times ,I won't lie about that and for that I've enjoyed it immensely. I'm a private lady, who hates the drama bull crap, and yet its like a curse that follows me half the time. Recently, when I lived yet again on my own, I had A HEART, and let a friend move in with us, out of the goodness of my heart. Never asked anything out of him, except to help with a bit of money , never asked to help with food, or anything of household concerns . Towards the end, when we lost the home, I moved into his  HOME , and it was the worst thing I ever made. He did a 360 once he took control of his home and acted like GOD, BUT in reality he was a DOG, or as I called him one day, A PIG ON A HORSE. Everything in the house belongs to yes ME, ME, DID I MENTION ME?! Yeah I think I got that covered. During the 3mths I had lived there, it was nothing but pure evil violence in the home, and  I'm so thankful my daughter never witnessed it! However it doesn't account for me hearing the screaming, banging things, and so forth with him and his  girlfriend in the house. With me and having severe anxiety and other medical conditions on top of, it didn't make things better. I have a ton of anger towards men these days and that alone don't mix well. 
Here I am months after the fact of what went on down during that time. Things didn't go well and it wasn't a pretty sight, either. The now ex-friend made life a living hell for me after the fact, and today we don't even talk. I never imagined in my wildest dreams that a person like this friend was even considered a human being, let alone a FRIEND.In the long run, he was not a true friend, and a backstabber. What a coward, and what a ruthless jerk. His KARMA will be the justice coming and I hope he learns his lesson one day. Until then, I just don't care about having roommates forever.