I had it for 20 years and didn't tell anyone, thank god for the internet. I'm not sure what telling my parents would have done for me. I wish now I had gone to my gp, that can get you somewhere.
I'm a parent now, I thought my son was getting it but I think he has grown out of it. Again I did not talk to him about it.
Why tell your parents anything- where does this thing come from. My son has his own space- I never go in his bedroom, I never ask him about his friends or what he is doing or where he is going. He has a mobile if he gets into trouble,