Exactly what LPH said, he is trying to draw you into his problems, they are not your problems. He sounds conflicted and feels the need to justify something to himself or the world. Don't get caught in his downward spiraling vortex.

It's hard not to and especially hard not to correct blatant statements that are just not true, but you sound pretty strong and it will take your strength not to be drawn into that morass. You've made the break and you are not part of a "couple" anymore so you know you don't have to satisfy or justify to anyone else but yourself. If you keep that thought in mind it will be easier not to respond. Sounds like he has not moved to that level yet. Pity.

As time goes by, this does get easier.

Happy riding