I think my 16 year old may have autism but he would never consent to being tested. What should I do?

My middle is 16. I believe he is on the autism spectrum. He has a brilliant mind but is very "different." He has a lot of sensory issues. He doesn't like swimming because he doesn't like the feeling of water in his face, he doesn't like the beach because of the sand, he doesn't like loud noises, etc. His body movements are awkward.He's also kind of a loner. He has friends but doesn't hang out with them. They just play video games online. He has no concept of how other people see him. He doesn't care about clothes or how he looks. He's more immature than his 14 year old brother and far behind his 18 year old sister. He has no interest in dating and I don't think he even notices girls or guys. He would happily spend all day on the computer if allowed. I can't see how he would move out for college in a couple years even though he has the grades to get in most places.He would never consent to an evaluation though. When I last brought it up he said he was happy with who is was and if I can't handle him then that's my problem. It's not that I can't handle him. I just want him to live his best possible life. via /r/Parenting https://ift.tt/2UGcX4f