Does he want me back?

My ex messaged me the other day to "catch up." we broke up a month ago. i ended things with him because he didn't treat me well, but we were never on bad terms. while we were catching up he told me he was sorry for how he treated me and admitted that he should've treated me better. we talked all day and then said goodnight and that he would text me the next day. i told him that wasn't a great idea. now we have been snapchatting the last three days about generic things. why is he doing this?
Does he want me back?
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