why would my ex keep talking to me?

[OriginAlyssa]

after my ex assumed i was sleeping with his old friend who's now my roomate he texted me something rather rude. then after about two weeks he messaged me apologizing and said quote
"i'm sorry i treat you like someone i'm not in love with, like someone i don't want to talk to me, but that's all i want. sorry." i know this isn't a good thing to be told but still why wouldn't he just stop talking to me or delete me from facebook.
and why would he be a hypocrite by saying he doesn't feel aweful about the way hes been treating me but apologize everytime we communicate?
i'm moving on from him but i would like more understanding on the subject.