How Do I Love People Who Hurt Me?

Has someone you cared about hurt you on a regular basis? How do we love them?  Or...should we even try to love people who don't love us back? 

I was once in a situation where someone close to me provoked me on a daily basis. I wanted to love them freely, but they were controlling, manipulative and insulting. I survived by adopting sarcasm as a second language, avoiding one on one situations with that person, and putting up walls to make me feel as safe possible. To other people, I appeared strong and confident, but on the inside I felt lonely and misunderstood.