Is he on the spectrum too?
If so, just hang out and do mutual interests like gaming or whatever.
If you are enjoying the touch and are interested, give him a gentle touch somewhere like a shoulder. Say something about preferring soft touch.
Or just go: “1,2,3,4 I declare a tickle war” if you’re enjoying the tickles.
You’re young. A boyfriend at your age is really just someone to hang out with. If he wants to do anything more than hold hands, occasional hug and/or kiss, he’s probs not a good candidate for first boyfriend.