Normal as can be.... I think?....

I am 18 weeks and 4 days today! Yay!! My fiancé and I find out the gender in less than a week and a half!!! Yay!!! I had my doctors appointment yesterday and the doctor said everything is as normal as it can get in a pregnancy and I have nothing to worry about:) yay! For most of my pregnancy my hormones have been steady, I've been fairly happy and so has my fiancé... The only problem is, I think he has a hard time showing his happiness, I know it's there, but sometimes it would be nice for him to show it. He owns three businesses and has a hectic day! I would feel bad trying to bring it up and making him feel stressed out. I do all his paperwork, make all the phone calls, along with make sure the house is clean and dinner is ready when he walks through the door everyday... So id say we both have pretty hectic lives, but how should I bring this up to him? I don't want either of us getting upset or frustrated/: