S/O not as excited??

So I'm only almost 9 week's but my boyfriend still doesn't seem as excited about the baby. It's his first baby and he was really excited when I told him the news but he just seems so not there sometimes when I talk about it for instance, we're about to get a lump sum of money and moving my son into the guest room and making his smaller room a nursery the thing is, is every time I talk about things we need to get and things we need to buy with that money mostly the expensive things like a crib, car seat, etc all he says is "I can't wait to get a truck" yes we have plans to get a truck and all he's talking about is that and modifying the car we already have. It gets to me a little like I know he loves me and this baby already but it's lile we're the furthest thought from his mind. I don't know maybe it's just me. Rant over lol