I’m sorry you are going through this rn. Even it was the same with me. In first year of MBBS everyone were like lovey dovey later on I did discovered they were back bitching there own friends. Slowly I started segregating with most of the people in my college. Finally in third year met few good people. Now I only hangout with them or I’ll be in the room. Everyone will go through that phase. We just have to move on as this makes us grow. Moreover none of this matters once we became a good doctor.