No, your not having a vibrant social life by no means indicates that you're the "bad" one.... not by a long shot.

Some people who are narcissists, for instance, can be charismatic and are skilled at finding people to be in their lives. And that includes be very skilled at finding victims to abuse. The person who hurt you could be one, perhaps?

Firstly: Do you have a psychologist/therapist to talk to? If not, that'd be the first thing I'd do.

Also, I would look up
- ways to increase your self-esteem
- codependency (there are online groups or in-person groups at CoDA.org)
- narcissists
- trauma bonding
- book called "Born to Win" book, it has some Gestalt therapy techniques in it that you can do at home.
- FOG (Fear, Obligation, Guilt)
- book The Gentle Art of Verbal Self-Defense
- book called "Feeling Good" which is about CBT therapy
- establishing boundaries
- how to find the right therapist

I hope you get help soon... the right therapist could be so helpful to you.