An I being immature?

My boyfriend for the last couple of months has been hinting that he wants to propose to me. I am currently 11 weeks pregnant and he said he wanted to do it when he found out I was pregnant but he didn't which I kind of just let go.

2 weeks ago we went away for a weekend and he said that there was something he wanted to do when we were there and grinned. I immediately thought he meant propose to me.

We got back home after our holiday and obviously I was a little disappointed. He asked me what's up and I said I thought you were going to ask me to marry you. He kisses my head and hugs me and says he's sorry.

I feel upset that he hasn't asked me to marry him .... am I being immature!?