I'm very sorry to hear about your grandmother!
My first Christmas away was last year and I embraced it wholeheartly - First time in my life I put up a real Christmas tree and I loved it- I made all the decorations myself! And then I created my own special Christmas Eve, making an amazing meal for my boyfriend and I and we watched 'Christmas Vacation'. We went to his family on Christmas Day and it was snowing hard and it was deep. So the drunken walk home to my house (3 miles away) was really amusing. But it was gorgeous, all the Christmas lights and the snow. His mum put on a great spread of food -all the traditions, I made J put on his crown
, his mum piled me up with presents (amazingly, considering she hated me in the beginning) and I came home and skyped my family.
I am cheating though, not really a 'Christmas' away, because I went 'home' at the end of the December and did Christmas again with my family. So its not the best example, but I guess my point is, go with the flow, tell your boyfriend all that will be special to you, and enjoy yourself! New traditions are neat- mince pies, Christmas crackers, sausages wrapped in bacon!!!, going to the pub on Christmas day, the Panto, etc. I would have been OK if I didn't get home, because I had an excellent day!
J had his first ever X-mas away a few years ago with me and he cried and I think my family completely overwhelmed him to bits. It was really tough for him, so now he doesn't go back with me. And I'm OK with that, we do our own Christmas thing now - I'm starting to plan our night, probably going to be on the 16th this year
And don't be afraid to feel homesick- the holidays are so tough and if you do become homesick ,its all OK- it's so normal to feel down. Just know that we'll all be here for you if you do. Happy Christmas!