Scared of men!!!

I got raped by my ex best friends brother. It’s been 3 years and I just started college and the girls from college noticed that I got really tensed when there are guys I the hallways walking past. One day this guy looked liked my friend brother and I ran back to my car and started crying. I can’t sleep at night if my bf isn’t home I’m afraid someone will come threw the door. Is this normal? Am I crazy? What is this and how do I get over it?? Any suggestions thank you!!