What would you do if someone called you ugly?

Kaay so i recently graduated from high school and i didn't get along with the guys that were from my face at school and some of their cousins added me on facebook and one guy, ive been talkin to for a while & he said that i heard you a fob and hella ugly and he was kinda laughing about it and he hasn't seen me in person but his friends have at school and he said i looked cute in my pictures so what do i do? I feel heckkka bad because i don't like being called that so do i just take it as a joke or not talk to him? I don't want 2 make it into a big deal soo what do i do? and how would you feel if a guy sorta called you ugly (girls)