Most Helpful Guy
This would like a kick to the balls, don`t open fresh wounds.
A month is quite a long time before you explain things, if you did it at the beginning you might have stayed friends.
Most Helpful Girl
I also broke up with my boyfriend about a month ago and I get your desire to talk to him, i'm on the same position. It depends on why you two broke up and how your relationship with him was before you two were together. I agree with the comment bellow on the fact that it would open up old wounds. However, you could still send him a friendly email, thanking him for everything. Don't say that you still love him though, because there's no point in that since you two broke up. If you decide to talk to him, keep it as friendly as possible. Don't declare your feelings or flirt with him. He'll notice that you care.