27 weeks and SO won't have sex

My SO hasn't had sex with me for a week and I had to practically force him to last time. I started to show pretty late and since I have he never initiates sex. I've tried to talk to him about it and he finally told me last night that he just can't get hard because my stomach gets in the way. I told him we can do positions where it wouldn't get in the way but he said he "just isn't feeling it" and there's nothing he can do if his penis isn't getting hard. It really hurts me to know that he's so turned off by my appearance. His insensitivity about the situation is also not helpful. I know I'm probably making a bigger deal about this than I should. I really should be thankful that my baby is healthy enough to make my stomach grow like it is, but all the same, it would make me feel a little better to know that I'm not the only one going through this. Any of you ladies experiencing anything similar to this?