Clara - You are so not alone in this experiecne, and although I have not read all the posts, you sound like you are doing such a good job, esp with PFB, and it is SOO hard alone, asp if you have a DP who should be supportive and ain't.
My DH barely picks up, or attends in anyay to my DD, now 11 weeks old. We also have a DS, 2.5, and he adores him, and dotes on him. DH did loads for DS when he was tiny, changing nappies etc.. but hasn't even helped bath or change or dress DD.
I don't know what his problem is. What I do know is that I have to try my hardest not to shut him oiut. My instinct is to shower DD with love as compensation, and not to ask DH to do things for/ with her. I've only been out once on my own for pleasure since she was born, and that was at night when she was asleep.
Keep offering him opportunities to get involved, and suddenly when the smiles and the giggles come, he will beome interested. Babies are terrifying for everyone involved, and you've had 9 months to get used to yours inside you, your LO is part of you in a way that makes men feel v left out. I suspect whilst being scared of losing you during labour, he may also have been somewhat in awe of the amazing thing you have done - perhaps a little jealous of the isntant bond that mums usually feel for their babies.
On the subject of Feeding - is he left out? Does he think that he could do more if the LO were FF? If so, could you express? Its worth asking him. Sorry if this has been covered.
It breaks my heart that my DH isn't interested in my DD, she is so beautifu, giggling and cooing. I stayed at my Mums last week for a break, and DD was quite poorly, DH wasn't even interested. I talk to my Mum, remind myself that it should get better, and keep trying.
good luck