You say your "GF" wants to fix your marriage if you can for "religious" beliefs. I would imagine her strong religious beliefs should stop her dating a married man.......
I dated before I was ready, but I got serious with no one. When did I know I was truly ready? When my ex could no longer provoke a reaction out of me except fi it wasn't something about our child I didn't agree with. When I no longer felt the need to spew or get into it. when I dropped speaking of our M, what there was, or what was no longer or could be or should have been. When we stopped discussing us or our marriage that was over.
What you are doing now REEKS of an affair. Now, I am not saying that as in your having one. Our WAS find someone else who lights their fire and finds everything wrong with us. All of a sudden, we are the people they can see no positives to be being with. Their OP has everything in common with them, their are no issues, they are perfect together, and well, the LBS is not someone they could be with ever.
Just like you wrote.
Hey, your exW may not the one. Or she might be. But I encourage you to get a clearer picture without someone else fogging it up.