I am a female in the medical field and have taken numerous seminars and had recently friended a colleague about 1 year ago.. We started meeting at seminars and saving seats for each other, going out for drinks after and even started traveling to seminars out of state and shared rooms . I consider her a friend when it comes to work things but we've never really hung out outside of work because we don't really live close to each other. I am getting married in a couple months and have been debating on whether I should invite her or not. My family said probably not, because we don't have a relationship outside of work, but i'm a little torn still, where part of me thinks I should. Please help.