I went through the same thing as a new nurse. I think it has to do with being a new nurse, being new to the setting, and GENERATIONAL DIFFERENCES. However, it is NOT just "up to you to fit in"; you deserve respect from your fellow nurses regardless of how seasoned you are, and it should be a mutual effort from all involved to build positive relationships. You should not try to change your personality or try to be more gregarious out of fear that you are "giving off negative vibes". Here's what's sad about how you're being treated: it lowers morale, which ultimately impacts the quality of patient care. In my case, they eventually came around (after about a year). I worked hard, stood up for myself, and was willing to let any past transgressions by co-workers go. Hopefully, the same will be true for you. You deserve respect regardless of how many years you have under your belt and regardless of whether or not you are a social butterfly. Work ethic, focusing on patient-centered care, continuous learning/growth, and patience will help you pull through this! Best of luck!