How do you love again after an abusive relationship?

It depends on the circumstances. If you were the abuser or the victim you need to think about your future very clearly. If you were abused often but not daily by someone who would not seek help you need to consider if your relationship should be terminated completely if they are still unwilling. If you are an abuser you need to pinpoint when and why you started such behavior and most likely involve yourself in some sort of therapy. If radically abusive or abused you need to seek intense therapy. If you stood around and took terrible abuse for a long period of time you probably are in need of therapy as badly as the abuser.

Just decide if you need to seek therapy or simply continue your life. You'll find happiness in being single if you were abused for a long period of time, and if you run into a new abusive partner or get together with the same partner and he stays abusive then you need to cancel that relationship and remind yourself it is not your fault. Good luck, I know that emotional and physical abuse can be taxing and dealing with it is difficult.