Can't stand his family! I feel horrible

My Boyfriend loves his family with all his heart and I love that about hime. We been dating for 2 years and I've tryed to like them but we are completely opposite. In front of them I just feel like I'm being fake I hate it. Is there any ways maybe I havnt tryed to do to like them? It's so important for me to love his family he tells me that all the time sorry if this seems weird.