1 year itch?

So it’s coming up to one year with me and my bf. ( I have never got past a year with anyone ) and I’m scared he is going to

Propose to me and I don’t know if that’s what I want?! I love him don’t get me

Wrong.

We recently had a discussion about having kids and the fact that I don’t want them. I thought he was going to leave me and I would have supported his decision. But he said he would rather be with me and not have kids than to have them with anyone else. Which is a big deal because he has always wanted kids.

Anyway, I feel like if he does propose and I say yes because how Could I say no?! That thats it, my life is mapped out. Marriage and a house and I’m not sure if I’m ready ?! I’m not sure I’ll ever be ready?! My family are always telling me I’m a free spirit and I am and I want to Continue to be. What do I do??