I need an opinion

So I have mock exams for school and I did really bad on chemistry and I went to my friend and she was talking with this other girl and I just sat there and then I told her I flopped my chemistry and that I was really sad about it. I know it’s like what was she going to do but when she told me she did bad on hers I comforted her and I don’t really need the comforting but when I told her I was sad she just started talking to the other girl and literally smiled in my face. LIKE THAT IS REALLY WEIRD RIGHT IM NOT OVERTHINKING RIGHT???