Do nothing. It is your wife's move. You said she didn't know what she wanted. You said that you tried and tried before but it didn't work.
You said that you let go and have left her alone and are in another relationship... THAT IS WORKING...
Keep doing what works. Leave her alone and let her come to you. Pursuing didn't work before. Accept that fact. This has to be her idea and her decision without pressure from you.
Just stay where your are. Don't put the cart before the horse. I wouldn't give up the woman you are seeing. Not a good idea.
We just had a thread last week called "the jealousy button".. It talked about how often the WS suddenly wakes up after the BS is seeing someone else. Looks like we have another example of it working here. She will never admit it, but I would venture to say that your dating and moving on was the catalyst that turned this around..