Is he behaving like a kid or am I being unreasonable?

I am so annoyed with my husband. Since we had our little girl, he's been great with helping out and is getting better with prioritising her and me over work. But sometimes, I honestly feel as though he behaves like a spoilt little kid. So earlier today he was sorting out his food and I asked him to watch her so I could sort out some food for her. She's 6 months but particularly clingy today and doesn't want to be left alone at all. So he finishes eating and then comes to get her. But by now she's falling asleep in my arms so I'm not sure whether to just hold her for a bit longer. Anyway, as I don't pass her over straight away, he buggers off in a strop and when I try to give her to him afterwards, he pretty much says no. He didn't want to get involved with feeding her, he did her bedtime but like a robot - absolutely monotone when reading her a story. He won't tell me what's wrong, we're now not talking, we're both bloody miserable. Am I being unreasonable? Any advice?