Why does your ex boyfriend still calls you hun?

Your ex-boyfriend may still call you "hun" as a term of endearment out of habit or nostalgia from your relationship. It could signify that he still feels a level of affection or comfort with you, even if you're no longer together. Alternatively, he might not realize that it could be confusing or inappropriate given your current status. Communication about boundaries may clarify how you both want to interact moving forward.