I've had these. Usually related to those I am close with. Dreams of bad things happening to them or dreams of intense jealousy. They make me wake up in a panic. I'm 37 now but only been getting help I the last year or so.
My therapist advised me that (at least in my case) these don't nessary reflect who I am in waking world. the reasons these dreams disturb me is because they counter my views of myself.
It's like if I dream of myself committing a grievously violent murder and I wake up disturbed. That doesn't mean I have a desire to hurt people it means the opposite.
Your own case may be different but you can't really stop bad dreams. Dreams are a symtomn of bad sleep so you can work on improving that. What you can do is learn how to process a dream and have it affect you less negatively.