Sounds like you want to reject people before they can reject you. That's a sign of low self-esteem and irrational beliefs. People will love you to varying degrees. And they're imperfect in their love. So, everyone's bound to get hurt sooner or later. That can range from little hurts to big hurts. Building up your self-esteem will help you weather the little hurts better. Also, examining the situation and your thoughts and emotions about the situation can help you identify irrational beliefs. Such examination can turn the little hurts into non-issues and help you better respond to the bigger hurts.

As other people suggested, talking to a therapist would help. Your behavior is not unusual. Many, many, many people do this to some degree regardless of their mental health status.

You're not alone!