Been in a very long relationship almost 5 years. My boyfriend seems to be getting closer to a group of guys he went to college with and has been hanging out a little more often. We don't live together and we have different schedules, so seeing each other is difficult. Because we don't see each other often and he hangs out with them more.. I'm afraid that I'm going to be replaceable or his friends will become more of a priority. I feel a bit jealous and worried. Why?