Intimate partner violence is a very disturbing event with long term repercussions. Both the victim and perpetrators need help. What you are r going through may not technically qualify for a particular diagnosis but that needs to be verified by a psychiatrist. If there are issues with personality or there is need for long term psychotherapy then psychologist can help.
Next Steps
visit a psychiatrist to rule out acute psychiatric manifestations along with someone you trust
Health Tips
don't be alone and most importantly don't sulk it is good that you have decided to end an abnormal relationship