It’s totally okay to have boundaries. It doesn’t make you mean, you deserve as much respect as everyone else.
Okay: Personally not liking a thing that an autistic person has a special interest in
Not okay: Putting down an autistic person for being so interested in it
Wanting not to be touched doesn’t make you a mean person. Wanting people to respect your personal boundaries doesn’t make you annoying. You shouldn’t have to put yourself through things that hurt or upset you just because other people think they are harmless.
A note on labels
As I am sure any cat owner will be able to tell you, someone else putting you in a box is entirely different from getting into a box yourself.
This is the most brilliant, concise, cute, and disarming response to the “but laaaaaaaabels are baaaaaaad” argument that gets used against people trying to self-identify as something as a way of making sure their boundaries are understood and respected.