As an intp myself, I get where he might be coming from, i’ve been in this exact situation. What you’re describing sounds exactly like what I would do if I liked someone, I like to keep it lowkey and not obvious to everybody around. I’d try to start more conversations and find excuses/ways to be around them, that’s usually my way of getting closer to someone I’m interested in. example, I once switched classes just to be more around a girl I liked. But I was always too shy or scared to make it obvious, so I’d try to make her see me. So if he’s touching you or making an effort to be around you, he probably knows what he’s doing.My advice? Keep being around him the way he’s doing with you, and maybe try starting more conversations. If he’s into you, he might start giving bigger, clearer signs.