Why does my ex boyfriend act like this?

he totally still likes you. He tried to get you to acknowledge him. The obnoxiousness was so he can try and come off as if "you dont know what your missing" pretty much show off and act all cool because he still wants to impress you & if you brushed that off & ignored it he failed so if it seems as if the break up doesnt even bother you its gonna hurt him therefore he retaliates with the name calling as if "ill show you im OK with out you" but thats all just an act i guarantee he still wants you & probably feels the same way as you do but hes a guy so hes gonna feel as if he should be the one to brush it off & you be the one moping so he might not admit it but trust me he wants you back.