My ex kept the customised keychain ( gifted by me ) even after a year of our breakup

My ex and i broken up on a very bad note coz he cheated on me with his ex . During our fight on other topic , He tore the handwritten notes (given by me ) in front of my eyes coz he has anger issues and he can’t control his anger at that point of time ( this fight was happen before the cheat i.e during our relationship) . But after all the things happened..cheat and all . I found that he still kept that keychain with him even after he doesn’t have that car ( i gifted that keychain specifically of that car only ) . He shift that keychain on to the other car’s key but he still have that .
What does that mean ?