Hi lovely Jim. Yes, I can see Mozza's take on this and agree there are risks with being over-friendly with your W. Particularly if she is giving vibes of non-receptivity.
IMHO, the best thing to aim for just now is effective co-parenting relationship - which is cordial, constructive, helpful and so on - but doesn't extend as far as 'friends.'
IDK - as others say, your W behaves as the 'wounded party' but actually she had her own part in this and betraying your vows with a third party is devastatingly hurtful. So I also don't think she is taking responsibility for this.
I think you are doing well Jim, although it may be time to revisit your GAL and see if you want to top up at all. But you are moving forward, you have sorted financials, you're doing well at work, being a good Dad, and interacting reasonably with your W. For all of that I applaud you.
Hang on in there my friend xx
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus