I think I've hit my stride.
The feelings of failure and being trapped and isolated have been dissipating. I have this quickly growing awareness about my baby and his needs. I can watch him as he discovers his hands and ponders the room, and allow him to direct his own attention. When he fusses I can talk to him and engage and give him comfort. When I attend to his changing and feeding needs it's calm and pleasant. His naps are predictable and have become increasingly lengthy and less interrupted.
And I feel a sense of calm and competence. My loneliness is easing. Being alone with a baby is not the same as being alone with a pump. Without it chaining me down to my bodily failures, I've managed to get out of the house and see movies, go to cafes, go on walks, talk to other people.
I've developed pleasure in watching my son play on his mat, trying his hand at grasping things and kicking his feet. He'll pump his legs in his bouncy chair to make it bounce on his own without the need for me to do it for him. Other than meet his physical needs and reading him some books and talking to him periodically through the day, I just let him be and he is so engaged with himself and his surroundings.
I feel like I've hit my groove and I know what Jack needs from me. I feel connected to him at last. I was always fond of him and was proud of his hardy little self. But the bonding was hard and now I feel it sinking into my skin; he's becoming a part of my heart.