dear WSL, hi and thanks for posting your comment.
Since your wife decided to move away and for what ever reason was a choice she made, and any effort for you to get her and the kids back went on deaf ears, so she has made this decision, but as you know you have rights to see your kids.
You may not know why she did, but there could be the possibility there's someone else in her life, sorry to mention that, but 6 months could be the time limit of her not coming back, and if however she did, would the marriage really survive and would you be happy or would there be too many pressures, and in saying this, I'm just putting the kids aside for the moment because I know that's a good reason for wanting her to come back.
There will financial issues that need to be discussed and visitation rights, but I haven't answered your question.
Now that you have meet someone else in your life, good on you, and I wouldn't feel guilty, and why should you, because you tried all your best to get your wife back, but she refused, and even if this did happen, the marriage would be strained, and I don't think that it would continue.
When your kids visit you and your lady friend, it maybe hard to begin with, but they will make up their mind, but unfortunately they will tell your wife all about her, and hopefully they will strong minded to ignore any comments made to them by your wife, because jealously may come into it.
Take the moment and appreciate your new friend, but also make sure that you still see your kids. Geoff.