What are some ways to show a guy you like them without actually telling them?

Me and my guy friend (well call him alex) have been best friends for 9 years and he has slight autism (i know he does his family told me) and has issues with social skills (again his family has told me) and has issues being touchy feely (experience) so i dont want to push his boundries (hugging is fine i think kissing might be too far and i am not sure about holding hands worth a try) anyways what are some ways to show i have feelings for him. ps i have a feeling he likes me (people have told me but he hasnt yet)