comparing to an ex ?

My boyfriend always mentioning his ex and we been together 6 months .. he swear he dont love her and stuff but always saying her name . For example: we was talking about gradbash & he was like i had trey songz at gradbash i said (playfully) if i had trey songz i wouldve gave him a signal to meet me in the back 😊. & he said i think diamond ( his ex) tried to do the same thing . Like what ? Who said anything about her like idc what she tryed to do .. what would this tell you ? He always bringing her name up nd its annoying like i NEVER compare him to anybody.