How do I recover from a broken heart/ How do I believe in love again?

Okay, so I got out of a relationship with this guy and well....he just wanted my body. We didnt have or anything but anyway. Its been a few months and I dont feel like the love between a boy and a girl is pure and good anymore. Its tainted. The last 3 relationships Ive been in have ended up the guy wanting something or using me, so is this true? Is there still pure, innocent love? If there is, how do I recover from this feeling. I dont even wanna date anymore. A little help please?