not invited to co workers wedding.

Okay well I've been at this small office for a year. My worker just got engaged about 3 weeks ago. They already have the venue so their getting invitations ready. And she invited all the other girls, but not me... And like I've got along with her the most and she's close in age to me, same age as my BF they were friends in high school. I know I've only been hear a year but she's only been here for two as well so idk I just thought she'd invite all of us like she has except me. I mean I'm not going to make a big deal about it, but it's just kind of like wth um okay.. I guess just tell me how it is!