You deserve to know what's going on. You two obviously had something special at one point, and I think she needs to show you at least some decency by discussing this with you. Reality is, I guess, that this isn't a perfect world, and you can't make her do that. But I think if you two don't talk at least somehow, there's going to always be some animosity and anger there that's going to be tough to get over. If you guys were a new couple dating for a week, and this happened, then it wouldn't be a good idea. But she's your wife. There's a lot more to it, and I don't think it's fair to you for her to just say, "sorry, love is gone," and leave. I think there's a lot more to it then that. And I don't mean get back together, cancel the separation, blah blah blah. If you need to separate, you need to separate. But if you don't talk, I think you're going to be left with a lot of unanswered questions (you know, the "what did I do wrong?" questions).