DD is 15yo, and DH and I have wondered for some time if she might be autistic. She finds making friends very difficult, is shy, formal and stiff in social settings. She is really only interested in horses and bird watching, and has no interest at all in fitting in with more stereotypical teenage interests, or even pretending to do so to make friends. Other potential symptoms could be her extreme sensitivity to noise (leaves the room if the hoover is on, very funny about clothes rubbing her etc). DD is academically high achieving, and enjoys activities that are "arranged" eg horse riding camp. She is able to cook basic meals, very self sufficient in lots of ways, but seems so different from other girls, just so serious and formal.
My mother recently mentioned to me that she thought DD might be "on the spectrum", and it seems strange to me that three of us now have this suspicion. DD would be devastated if she suspected, and the last thing we would ever wish to do is hurt her feelings, so we've never broached the subject with her.
Is it worth seeking a diagnosis? Is there any effective help or support for an able, high functioning teenage girl if we do go down this path? Could her relative lack of social skills be down to immaturity?
Feeling a bit sad and worried, please be gentle.