First, if you are hurting, but can't identify the source, please reach out. Call/text someone to come sit with you. Ask for help. If someone close to you is just not who you know them to be, stick your nose in their emotional business. An inkling that "something's not right" is enough to start a conversation or take action.
By the third day, our beach observations had made an amusing connection. We looked out onto the water at the mass of surfers quite numerous divided into several "small groups" with an occasional loner off to one side or the other. My man and I laughed as we identified ourselves according to social surfers and the loners.