When I'm really into a guy, I find excuses to touch him. Not "oops, I didn't mean to bump into you when we walked past each other". Something deliberate. A hand on the arm; playfully swatting at somebody; if we're emotionally close enough, I might hit him in the head with a pillow or beep him on the nose. Yea, if I really really like you, I'll probably beep you on the nose at some point.