This is a great chart I found at helpguide.org. For more information, check out their webpage–lots of great information!
The first step to getting help is recognizing when you are in an abusive relationship. Try to put aside the feelings you have about your boyfriend or girlfriend and take an honest look at how you personally feel about yourself when you are with this person. Abusive relationships are not usually abusive every second. Usually, they follow a cycle of ups and downs, good times and bad, loving behavior and abuse. Even if things are good for a while, abusive relationships tend to follow this cycle until you break it by getting out of the relationship and away from the abuser. Remember, no one deserves to be abused (mentally, verbally, sexually, physically or emotionally) EVER. You deserve a loving and healthy relationship. You do not have to stay in an abusive relationship, no matter how stuck you feel. You have the power to get out. Use the help around you and don’t give up!