Ex doesn’t appear to be over me and I’m seeing someone new?

My ex and I broke up nearly 5 years ago this year. I broke up with him and though we decided to remain friends, more recently he has started doing things that I am uncomfortable with such as calling me pet names he used to refer to me as. Also bringing up our past in conversation with our friends and sometimes it could be things related to sex which makes me uncomfortable. I don’t know what to do as I find it inappropriate regardless as to whether I’m with someone or not but more so if I am. I feel he is not over me but states he is. Any thoughts?

Ex doesn’t appear to be over me and I’m seeing someone new?
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