Got my ex back, now what?

I finally got my ex back after a month of following the no contact rule, worked like magic! Now I have him back and I definitely don't want to lose him again. We've broken up twice and both times were my fault because I was insecure and I said some really nasty things to him and we broke up for the second time. I really love this guy because finally I met someone who doesn't take none of my **** and whose put his foot down. He's a keeper. Just what I've been looking for. I just don't want to F up again. I had a real bad temper and I have learned to relax with meditation and well I've been following The Secret and works like a charm. If the law of attraction is not real, well its working for me. How can I keep him interested in me? How can I control my temper? because I know now that we are together again we are eventually going to have our disagreements and I don't want to make him angry and him leaving again. I'm just always used to being the one in control and this time I'm not getting my way. And I love it! lol