College's last day

Hello I want to narrate you what happened on my college's last day. So we had a batch photography that day and one of my girl classmate came and took photos with me. We took some photos and that's it. That was a very long day and photography with friends took to late evening then it went dark.After the photography was over I started going back to my hostel with one of my friends who was also friends with her. In front of the hostel there is garden and she sat with us. We talked very normal things only how we talk about the last day. So after that we went back to our hostels. So at midnight around 1 am or 2 am I started getting messages from her and I don't know why they were full of abuses in hindi. No one ever has abused me not even my friends as I never abused anyone. So they used to not utter any abusive words in front of me. I don't understand why that girl abused me. We have never ever had any talk apart from studies that too she only used to ask me notes before exams or practicals. She even wanted to be in my last year project group but I was already in a different team. So I refused and told her to join two or three teams which I knew were good and having space. But these can't be reasons to abuse right that too on the last day of our college life. So our exams started and one day I met her in the corridor. Our roll numbers were wide apart so we were allotted different rooms so we met after some weeks I think. I asked her about those messages that night. Her face turned uneasy and she told she doesn't know or remember and that her roommate might have messaged like that she told which again I don't know how can someone's roommate use phone and that too abuse a boy. By her behaviour honestly she seemed to be a very soft spoken girl to me in those 4 years and we had never talked anything apart from studies. Sometimes like once or twice she went offtopic and asked me to go to the gym but nothing more than that. Why had she messaged me like that?