If it makes you feel better, I'm 22 and exhibit every trait down to the bone. I didn't even know it existed until 2 years ago. And all my previous doctor told me was "I believe you have this, but I'm not diagnosing you with it because I don't think it's a good idea". They don't want you to believe you have it.
With zero insurance, zero family support/acknowledgement, and a psychiatrist that has known me for 3 years will not diagnose me with it. I need to be it's the only thing that will convince SSI that I am disabled. I've been hospitalized for attempted suicide 6 times! I've gone into ****ing cardiac arrest and these idiots just refuse to diagnose me. I'm so. Angry.