How can I get my other half to be more involved?

How can I get my partner to be more involved in the pregnancy? I'm 30weeks and he's never really been all that interested he's been to all the scans let me book private scans etc, but as soon as I start to talk about the baby and become excited about something he totally shuts me off and is just like 'oh right' no continuous conversation I just want him to be as excited for our little ones arrival as I am after all he asked me for this baby?