Work friends are sometimes just that

Working where I do, you tend to get somewhat close to your coworkers and immediate supervisors. We become a family because we work so closely together trying to make the guests happy. I always go in with a big smile and everyone is happy to see me (even some not on my team). We become friends on Facebook, talk about our personal lives, and even sincerely miss each other when we go on vacation. However, recently some of the ones I thought to be pretty close to all went out and celebrated one of their birthdays. Usually I’m not petty like this but it kind of opened my eyes. If I had just thought of them as work friends, this wouldn’t be an issue, but I actually thought we were more than that. It feels like a slap in the face. I’ve only lived in this area for 2 years now and still don’t really know anyone except for work people. I only keep in contact with one friend from high school and one from college. I think I’m a likable person. Then again, I’ve never really been the first picked….