The SLIGHTEST signal from you will go miles. Touch his hand, or hold his hand, touch his leg, or shoulder, you get the point, at any given moment. If you guys sit next to each other (wait there is no fucking COUCH) to watch something or just talk, and he sits next to you, like right next to you, confirm for him by scooting that much closer or something.
I know, all that seems stupid and childish, but from my past experiences, stupid little shit like that was all it took for me to say OK Game on. I'm not telling you to make the first move, in fact, don't make the first move, its just those subtle hints that say HEY FUCKER MAKE THE FIRST MOVE to him should make things wide open, pun intended.
If none of that works...then move on, dude needs to grow a pair still.
And for what it's worth, years and years ago, I had to be careful how stoned I got, if at all, during the first couple dates. Being high during the first couple dates had the COMPLETE opposite affect of being drunk.