is this bad?

I have a 14 month old son and his father ha never really been involved.. he is only involved if I will be with him and he's just not the person for me. But he's never once changed our sons diaper, not even in the hospital after my emergency c section. He has never once fed him a bottle granted I did fully breastfeed the first 4 months he still could have after. He's never once rocked him to sleep, never once changed his outfit or gave him a bath. Is it bad that this stuff hurts me? I sent him a video of our son walking for the first time and I didn't even get a reply... it's been a month since he's asked about our son. This breaks my heart and I don't know why it still does, he hasn't really been here from the start. I guess I just wish he cared a little more about the most amazing little human I've ever seen