What if My Boyfriend Won't Spend Thanksgiving with My Family?

What if My Boyfriend Won't Spend Thanksgving with My Family?
I've been dating my boyfriend for almost a year and this Thanksgiving will be our first one together. We've already decided that I'm going to go home with him in December to spend the holidays with his family and I just assumed that we'd spend Thanksgiving with mine, but he made up all these excuses as to why he can't. What should I do?