How can I get my 19 year old in therapy?

I posted a few days ago regarding my son being in a "relationship" with a female anime cartoon character.
I am finding that it is similar behavior to a Brony.

He does not think anything is wrong, he is happy.
How would I get him help if he is happy?
Is it acceptable for me to go to a therapist, explain what is happening, and learn how to treat this myself.
Today I am trying to find a psychiatrist.
Thanks

Mom21son, I suspect that every professional in this field will tell you that they or you can only help if your son is open to treatment. Maybe you can get some suggestions from them about which aspect of his life/ relationship he is likely to be dissatisfied with and start with suggesting to find a solution for that! My MI partner appeared in such absolute and complete denial about the "bubble" he called his life he had created and seemed determined to get on with that that I mistook his determination for happiness. I missed to see the aspects that made him feel ashamed and guilty about this behavior and when I finally saw those I was able to suggest that he try to do something about that. It was one tiny step and the rest of the work was all for him to do! I know it's hard to accept but you can't take that journey for your son! If he has a condition that needs treatment he needs to want treatment and he needs to want to get better!! My advice for you is to rather talk about yourself with a therapist, to see if you can learn some ways to better cope with this tough situation! Wishing you the best!

You can also create the conditions at home that will increase his motivation for at least the assessment part of therapy. Would he be willing to look at it as a professional consultation to ease Mom's worries? Think of it as a single session and then see what happens? Just getting him in for an evaluation and professional opinion might be a logical starting point.