How to say no to being a maid of honor?

I've been asked to be a maid of honor for the first time in my life. We've been best friends for about six years now. She's been what I'd call a "good friend" for about two years now, but things have become more complicated. We had our ups and downs, but I thought we'd gotten past all that.<br><br>Recently, though, she's become very critical, judgmental, and dismissive. She doesn't appreciate my opinions, doesn't offer any emotional support, and has repeatedly made me feel bad about myself. I've tried to "suck it up" and be more tolerant of her behavior, but it's become exhausting.<br><br>I've realized that I'm not invested in her happiness or well-being anymore. I don't feel close enough to her to be a maid of honor, and I don't want to pretend to be something I'm not.<br><br>So, how do I say no? I don't want to hurt her feelings or make things awkward between us, but I also don't want to commit to something I'm not comfortable with.