Claims my weight isn't an issue, but his actions tell me otherwise, what do you think?

My boyfriends skinny. He's 6'3 and like 150. A little to skinny, but that doesn't bother me. I still love him and am attracted to him. Normally, I am a thick girl. I'm 5'6 and about 175 give or take a couple for fluctuation. I got a big and big che ches....and he loves it. He never asked me my weight or sizes or anything, he never gave a damn. Well, now I am 9 months pregnant and feel like a ******* blimp. The doc says I'm on track with my weight, I have not gained to much. But listen to this. My boyfriend says he doesn't care about my weight and he thinks I am rockin y no matter what. But, when we were at the docs office he was sitting in the exam room and when he saw in the hallway that the nurse was weighing me, he jumped up to see how much I weighed. Dumb got decked for it too... it really hurt my feelings. Obvisouly I am sensitive.... but doesn't that seem like "caring" about my weight? He asks all the time now too. WTF....