I have been thinking about this and wanted to add some more.
Myself, I would talk to a therapist. They are trained in this. It is their specialty.
It is possible your parents already suspect. Perhaps they are wondering how to bring it up.
I generally dont bring it up with anyone because in the past when I have mentioned my issues to my siblings, they either ignored what I said or discounted it. Why do you feel your parents need to know? Are you in need of extra support? I never told my parents because they were elderly and I did not wish to burden them.
Best wishes Beaflower.