I wanna tell her.

I don't wanna disrespect my fiancés wishes but he's being so selective on who to tell the news to, which I understand as I'm only 5w4d. He let me tell one one of my 2 bestfriends but he won't let me tell the other. I'm actually closer to the one he doesn't let me tell and it's sad because she told me when she was pregnant right away. We text and I hve to make lame excuses as to why I didn't go out for drinks last weekend bc I suck at lying. I really wanna tell her, what do you think I should do ?