Hello faith,
The truth is, that you are a changed person due to those circumstances that entailed the relationship you had.
Without knowing the durational circumstances and emotional investment involved, there are different answers that can be offered.
Without knowing specifics, I would say to "clean up" the "milk that has spilt" and realize that you survived this unfortunate situation.
Take things slow and if life still seems to be a bit unbearable, I would respectively suggest seeing a therapist.
Take care.
Phoenix