<human>: Can you condense the text into three sentences or less?

We have been best friends for seven years now, and she's been dating a great guy for two years and they're getting hitched. Question is below.

So, I find it incredibly sweet and flattering she wants me in the wedding, especially that she would want me to be her Man of Honor (like the maid of honor, but a dude) however, I honestly am not sure I want to do it. I have HORRIBLE anxiety and sever Social Anxiety, which makes it nearly impossible for me to get up and feel like people are looking at me, judging, etc. As a Man of Honor, just the thought of it triggers my anxiety as this is something kind of unusual, and I feel like people will be judging and laughing. I know they won't, rationally I know they'll be happy for her and probably have no thoughts about me either way, but still....

 She has quite a few girlfriends that would jump at the chance of being the Maid of Honor, and honestly they'd probably do a better job, but I guess my question is this: is it incredibly rude and insensitive to say no? I'll suck it up and just do it if I have to, and I'll act happy, but it'll be miserable for me. 

Not belittling anyone who has been a Man of Honor, I just will be incredibly nervous the whole time and feel like I will be a bit useless.
<bot>: Best friend asked me to be Man of Honor in her wedding, not sure how to respond to her as I honestly don't want to do it.