My friends think i am exaggerating

My university friends, the only friends i have didn’t check abt me for missing the only class i love in university “thinking i was sick or simply didn’t wanna come” without informing them which i never do. this made me so mad so i didn’t talk to them i said hi that day but didn’t talk, they didn’t show interest to talk to me , they tried once and when i said i am okay the ignored me. I am sad cuz if i were in their shoes, i would keep calling and calling till making sure is they’re coming or are they okay, not wait till the end of the class and while waiting for their comedian who makes them laugh. So is it my fault ? Well yes it is for not checking the time of the class, but are they wrong for not trying to reach me knowing that i’ll go to this class even with a dead body? Am i cheap as chips for them or am i just a drama queen?