How to get over engagement disappointment

So.. Me and my sweetie did our Christmas early this year since we both work most of this week, and I was SO hoping for an engagement ring... We have been talking about it a lot! We just moved in together a few months ago and I really feel like we're ready! So we were opening presents and the further I got, I started to realize I wasn't getting the question I've been dying to be asked. And I've been kinda depressed ever since. Am I a terrible person, or what? I am so thankful for having a sweet boyfriend to spend Christmas with, and I LOVE what he got me... I just am a little sad :(