how do you find a good guy?

I have been single for about two years now, almost three and I've been trying to find someone. My ex-boyfriend of four years, mentally abused me and broke me in ways that I didn't even know I could be broken. I feel like I don't even know how to date or how to be myself anymore. I never had this much trouble getting a boyfriend when I was still in high school and I'm only 20! Is something wrong with me??