Pack, love it! Keep up the great work. Really good stuff here. Even your struggles are normal, and you seem to be handling them really well.
I am not a social media guy, so I don't know what the protocols are for adding someone to social media. Was it too soon? IDK. Seems like most people nowadays are very quick to ask for a person's social media accounts, like we asked for phone numbers back in my time! So I don't think that was out of line. I think you handled it well, confronted it and moved on. Did she unblock you after she found out who it was? If not, that is your answer. You tried, she wasn't interested, move on! Life is too short.
But man you are in such a strong place, it is wonderful to see the improvement in someone. This board is often quoted saying that if you DB you will be successful, even if you don't save your marriage. And you are the embodiment of that!
Obviously, I have no life experience to share with you related to coparenting and dealing with your Ex. Just keep doing you!
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018