Of course, communication is key in any aspect of your marriage and while it may be important to know what you want to say to your wife it is much more important to know how to say it. Women can be very sensitive and right now your wife is probably a bit skeptical of you and your intentions. Try to make her feel at ease and think about how you can say what you want to say without accusing or making her feel that all of this is her fault. Nobody want to have their faults pointed out and it is much more effective to allow her to discover the ways in which she contributed to the downfall of your relationship and realize that she is throwing away a perfectly good marriage. And of course, once she realizes that she did contribute to the breakup she will be more apt to want you, your marriage and to come back to you.