Haven’t read the latest posts. Very interesting points raised and a good discussion. Still feel a bit gutted for you @toosassy
and @magda and others. It’s horrible when you put so much effort in and the problems are insurmountable.
Did my DP love me? That’s a really good question. I think he did, and then he changed, he felt his love for me meant he loved his kids less. So it became tainted. He couldn’t feel love for me as fully anymore as it was full of guilt.
I remember clearly one weekend some years ago when I said casually to him ‘I love you’ and he didn’t say it back. It was the same weekend that a situation with his DD1 exploded - she’d got into big trouble and lied about it to DP as she was angry at him. She blamed me for some of it too apparently. Although neither me or her parents were to blame in any way. He withdrew some of his affections. Partly because of defensiveness. The incident had exposed his facade of having a perfectly happy and functional separated first family, and he didn’t like me being close enough to know that.
I felt from then on, that there was a barrier between us. He knew, really, that there were dysfunctional dynamics, but ignored the effects. As his girls grew older and wanted their own lives, he missed them more and would increasingly do anything for them, indulging them more and more. I was just at home with him and therefore he didn’t have to make the effort.
He also got rewarded for showing less love for me by his (now 18+ adult) DDs. Unconsciously perhaps. In small ways like we went to the cinema for the first time in ages last year (he goes most weeks with his DDs). We dropped DSD off on the way, she complained that he hadn’t asked her first to the show and he apologized to her
He only hugs his DDs when I’m there, never me. He agonized over their presents. I got tokens. He stopped wanting to go away with me, as they would complain.
It all erodes love over time. 
There were several triggers for me. At first there were smaller ones involving his Ex. She had a key to the house! Boundary issues should have been a massive red flag, but DP really took on board these and they were resolved, temporarily. However later I realized that they were just pushed underground. His Ex still treats DP like a husband and will lean on him emotionally. He just doesn’t tell me.
One of the biggest was when I asked DSD to stop ignoring me and DP undermined me and sided with his DD without question. It had gone on for months and I was dealing with it in a good way, if by this stage a direct way. It made me realize that DP did not care about me and was too weak to stand up to her himself. The whole house was under an oppressive fog, and no one was functioning well. I knew then that for the sake of my family I had to give them a more healthy environment. It wasn’t just about my feelings, it was my responsibility as a parent to my younger kids.
@toosassy thank you, it means quite a lot to be able to share stuff and be actually listened to! I’ve accepted that this was all a mistake on my part, I should have left with the baby and run for the hills!
So sad your DP bought out his phone at the ONE time you needed to solidify your relationship. He needs a wake up call! It is only a few % of the time we need to have one to one fully present partners. Otherwise it’s like they are broadcasting that we are just the side support on dysfunctional first family show. That’s no way to live and our lives are too short.