Bf won’t spend holidays

I’ve been with my bf for almost two years now this year would be our second holidays together and he never wants to spend them with me or his family. He stays home alone doing nothing his family throws parties at his sisters and he never shows up just stays home. He said he wasn’t spending Xmas w me this year that he just wants to “stay home and be left alone” is this weird this is def a deal breaker for me the first year I thought he’d get over it as time went by but he didn’t