Naming the baby (31w4d)

I really love the name Autumn and I’ve always wanted a daughter named that but my SO hates it..it’s been stuck in my head for a long time and I don’t wanna change it.

Lately he’s been making a big deal out of it and says “it’s not fair I don’t have any say in this”. But I’m letting him choose the middle name and she’s getting her last name yet he’s still acting selfish .

Not to mention, he didn’t really want me to keep the baby when we first found out. What do I do? He’s a good person but he’s feel entitled to everything and acts like a big ass baby.