tl;dr: Don't be nice to fat women. They will always resent you for not pulling back the rolls and diving into meat mountain.

This girl in my graduate program since August has been clearly attracted to me. Problem is she is morbidly obese (about 250 pounds) so just not worth it at all. Nevertheless I have been friends with her and we have mutually helped each other in the class we have together. But I never discuss personal matters with her and I always turn down her requests to hang out one on one though she has never openly made a move on me.

Well now I think she finally got the point that I am not into her in the slightest because out of nowhere she ignores me and is quite rude to me in conversation. Nothing about my attitude toward her has changed in the slightest. Point is friendship between men and women is 100% a waste of time. Women, even hambeast women, will resent better looking men for not wanting to bang them because of feminism. Don't put any effort into being kind to them. Their actions are just incel/niceguy syndrome in reverse.