<human>: Give me the gist of the text in a nutshell

Hi weddit! I only have asked 4 girls to be in my wedding, my sister and 3 very close friends. FH wants 6 groomsmen. I'm 100% a-okay that it's uneven. Apparently I (after a couple bottles of wine) agreed to up mine to 6. He mentioned it this week and I didn't know what he was talking about, it turned into a big thing. At first, I thought it was because he wanted even #s. Nope. He wants me to either have 6 so it looks like we maxed out our bridal party or I have to include his sister. I feel bad that I don't want her standing up with me, but he's hell bent on it because she's important to him. I get that. But I am not close with her. I have many friends, but I keep them at an arm's distance. The 3 friends I have asked definitely fall into the super close - more like sisters, that I know no matter what we'd never have a falling out. I hate this feeling that I have to include someone I don't hold in that same close sentiment. My guard is definitely not down when I'm around his sister or any of his family, I just don't have that level of safety/comfort to get close to them. So when I think of getting ready and spending the day with my bridesmaids I don't want to have my guard up and feel awkward. 

Any ideas to get in a better place with this? Has anyone else been in a similar situation?
<bot>: FH wants his sister to be a bridesmaid, I think only my "circle of trust" should be included.