since you're satisfied with the answers on your first question, i would like to answer your follow up question.
i dont know why did you two broke up but since you're the one who told him to be just friends, i guess his pride was hurt when you dumped him..i mean, "ok, you dont want me as your boyfriend anymore, so let it be and i dont wanna talk about it anymore." something like that.. so if i were you, dont force him not to ignore you.. give him time to forget everything about your break up.. i'm sure when time comes he'll not ignore you..
coz in every relationship there is always valuable memories to be kept..i'm sure he'll keep some good memories you gave him that would lead him to treat you as a true friend..just give him time.
i hope you'll like my answer..i dont know if he dumped you or you dumped him..but this is my answer..Good luck and Godspeed!