CLG incident

,........,........ ,........,........ Need opinion on what to do. Is it normal?, is there anything I can do to change it?., or am I the problem?. So need opinion.Today I felt left out. We had a teacher's farewell, and one friend planned to buy a cake. He collected 100 rupees from 25 students, but I had a feeling he was just planning to take the extra money and I was right. He bought a small cake, probably worth 800 rupees at most. He gave cake to everyone else but didn't even offer me any because I hadn't contributed my share. It's not that I cannot give 100 but I just didn't like him taking pocket difference and this guy always do that like when planning tour he proposed to arranges buses and hotel and Planned free tour for 5 friends of his and one of his friend gf.

My other friends also started playing among themselves and ignored me maybe I am just not that important. Furthermore, the friend I share a flat with constantly complains and backbites about three other friends he hangs out with, but when he is in class, he always hangs out and talks to them while ignoring me. I don't know, I am an introvert, so maybe that is why.

However, I always help them when they need me, like during exams by showing my paper or helping with homework. I remember one time a classmate asked me to share photos of notes that I hadn’t even finished yet, but I went ahead and completed all three chapters just to send them to him. Even when someone asks me a doubt, I always try to explain it properly. Why do people like backbiters who act friendly to someone’s face but talk behind their backs?.