I've not finished reading the tread, but have to post.
It's a fact about relationships your personal relationship dynamics becomes the norm for you.
I was in a horribly abusive relationship, but it was normal for me, to not bother ever going out with friends, or if I did it would be arranged with military precision, I'd have to ensure ex would not find out, I had to ensure my DC's had babysitters or were at school, ten I'd spend the whole time unable to enjoy myself as I would worry that ex might find out, come home early, might notice or something. These were meeting for lunch or coffee with female friends, nothing bad at all.
So I wouldn't meet up with friends anymore, I would be really careful if friends phoned me and ensure I was watching out the window and if I saw ex I'd hang up immediately.
Even if he allowed me to o out, I had to ensure there was food in the house, the DC were fed, clothed, and everything sorted, there was food for the bastard so e would not have to lift a finger etc. Even then he would call me constantly, one time he called and demanded I come home and the DC were crying for me, they weren't they were asleep.
The first time ever I arranged to meet a very old, very dear friend after getting together with DP I remember rushing to sort things out he looked at me as if I was mad and told me to go and enjoy myself. He did not text once whilst I was out till I text him to let him know I was on my way home and e text back to tease me about he amazing supper he and my DC had had together, then e came and picked me up the train station and we chatted on the way home.
That is normal and a healthy relationship.
You won't actually realise quite how abusive your relationship is till your out of it.
There were things that happened in my marriage to ex that I refused to even acknowledge during my marriage because I could not face it, I could not face the fact I was in allowing someone to treat me so badly. And facing up to it would mean being more miserable than I already was.
Leaving that marriage was the best thing I ever did.