Giving her space is good. But the best thing you can do is work toward changing. It is one thing to say you want change, but another to actually do it. At this time, she probably has very little faith in you. No matter how much you promise her, she will not listen.

Instead, you must change and mean it. You must work on it every single day. Go to therapy if you have not already started. See a therapist who works with people who have domestic violence issues. Work on changing your inner voice. If you see something you don't like, instead of saying hurtful terms like "that's stupid," instead say, "I disagreee" or "that isn't something I would like." Do you see where it changes the meaning? You still say that you don't like something, but you own it, instead of making it about the other object.

Example: your wife has a new hobby but you are not interested in it. Instead of saying, "that's a dumb way to waste your time," you can say, "I don't enjoy that activity myself, but I see it makes you happy." Does that make sense?

These are just some ideas and you are going to have to work very hard. But at the end of the day you need to remember one thing: You need to change for yourself and not just for her. By become a better person for yourself you will be a better person for all the people in your life. No matter the outcome with your marriage, becoming a better person will help you cope with life in general as well.