Being Ignored hurts and how to deal?

Recently we did a trip with friends with each of our families. It was a long road trip and 3 of them followed the same path whatever one person said and the one who started this idea of this trip. 2 families took flight, and also took different routes. We did road trip too but added few stops before joining them on their main trip plan. Some of us took routes as per our own interests and joined wherever possible. We all kept eachother updated where we are etc. On return back home we tried to book in the same town with the 3 families who drove together but different hotel as booking were not available in same place and ensured we kept them updated when we reached etc. We were technically in the same group, however, at the last stage of this trip while returning home they just left the town even without informing us when we took all the efforts to cancel our booking in other town and join them on return journey. They let us know they left only when they reached 2-3 hours ahead somewhere. When we asked, we were waiting for your message. There was kind of contradictory response like we thought you had different plans or like we thought you already left etc when we made it clear we booked in same town to join the group back home . Surprisingly, the person who arranged the trip used to post all messaged like where they are or whether reached anywhere as there were 6 families and they were dispersed so everyone come to know except this incident which all 3 remained silent and did not message on the group about departing the town or starting the journey which was unusual. It hurt our feelings a lot and we kept wondering that all these 15 years we stuck to these friends like a shadow but why were we ignored? Was it deliberate? All did their own stops too as per their interest so was this deliberately done towards us Does this happen when you are buddies for so many years and especially when you know you are in same town and planned for going back together or I am thinking too much? I feel insulted and do not know how to react and behave when I meet these people.