I'm #6 on her list of most important things :(

My girlfriend of more than 3 years is taking a trip on Sunday morning with her boss and coworker to a convention for a ladies clothing store, my girlfriend is in college to become a teacher so this is only a part time job that she tells me she does not enjoy much. I have been trying to get her to go on a weekend trip with me anywhere but she tells me it is too important for her not to miss church. So, why can she go for a job that she does not even like but refuses to go with me?

you should ask her directly the reason