Don’t give up entirely until you find out he actually got your email. Interested or not, polite people respond to obvious invitations one way or the other, and he sounds fairly polite so far. If he doesn’t respond at all, I would phone him after Christmas and ask him if he got the email. Put the ball in his court so you don’t need to keep on wondering if he got it or not. If he says he got it, then mumbles some lame excuse, write him off. If he says he didn’t get it, ask him to coffee or the movies or whatever right then. Enough pussy-footing around - you want this guy, and if he doesn’t want you, he can be a man and let you know.
Oh, I also wanted to say congratulations to you for doing something outside of your comfort zone. Nothing builds self-confidence like doing things you weren’t sure you could do. If this guy isn’t interested after all, don’t let it stop you from going after other guys. There are 3 billion guys in the world, after all.

