Husband don't want to have sex.

So I'm 21 weeks and I've been craving to have sex with my husband for a while now. He doesn't want to have sex and I dont know why. Before the pregnancy it used to bother me that he doesn't want to have sex but not as much as it bothers me now. He is never in the mood. Most men say that during a pregnancy they are afraid to have sex because they might hurt the baby but that's not the case. He is never in the 'mood'. He would rather give me a quick kiss or a hug than to get intimate. It kinda breaks my heart. 😔 I have discuss it with him and how it makes me feel but nothing! What to do now?