boyfriend has no interest in me anymore

For a while my boyfriend has had no interest in me. I have to practically beg him to hangout with me. I'm 20 weeks pregnant and I know I'm not fun anymore and I don't feel good most of the time but I don't feel that it is fair that he can't spend 2 hours with me to watch a movie. He doesn't kiss me anymore, or cuddle. I'm not sure if it's because pregnancy has made me unattractive or if I'm just not fun to be around. Maybe this is my horomones getting the best of me.