CW: Abuse

Hello - could anyone please give me advice on how to deal with the pain of having an abusive ex-partner? I have been trying to heal from a physically / emotionally / sexually abusive relationship for half a year now, and it feels like I'm making no progress. It's so frustrating constantly obsessing about them and feeling love towards them, thinking I miss them, despite all the torment they caused me. Any help would be great. Thank you!