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

So my girlfriend's best friend is getting married in August. My girlfriend is the bridesmaid, so she definitely will be involved in the wedding. I have a couple problems with my gf's best friend, and I really don't want to go to the wedding.

I work with the best friend, and she is my superior at the workplace. At work she's a total cunt. One of our co workers has a disability and she either doesn't notice or doesn't care, and openly mocks him and gives him shitty work to do all the time. It's honestly heartbreaking to watch. I tried talking to her about it, and she acted surprised to hear he had a disability, but the mocking continues.

Also, I came into work wearing shorts for the first time since it's summer now, and the first thing she does is laugh at me and mock me for my "chicken legs". Now, I have some body image issues. I'm extremely skinny, but I used to drum, so I like to think my legs are toned. I guess not. My girlfriend reassures me that she finds me attractive, but I can't help but think of myself as way too skinny and out of shape. It doesn't help that I'm dealing with depression as well.

I can't bring myself to go to the wedding, even though my gf really wants me to go so I can dance with her or whatever, but I honestly don't give a fuck her best friend is getting married. She's mean. She is an art student (sorry for the stereotype, haha) so she automatically knows more about whatever we try to talk about while at work, and she constantly talks down to everyone. I don't want to sit at a reception with a bunch of drunk strangers while my gf is doing wedding shit. 

Should I tell her how I feel about this? I think I should probably just suck it up and go to the wedding, but I really, really don't want to.
<bot>: My girlfriend's best friend is mean, and I dislike her. Should I tell my gf I don't want to go to her wedding because of this?