I'm in a similar situation -- he said he doesn't know what he wants and he needs to figure it out, but he wants to continue getting to know each other (while not getting my hopes up or not letting me get hurt or something like that). You're doing the right thing -- laying low and waiting for him to call.
I, on the other hand, suck at this and end up calling/texting every couple of days just to check in. New resolution -- do not call, do not call, resist the temptation!!
Last night, he wanted to 'connect', we talked on the phone on the way (his call), sat and chatted for an hour, then talked on the phone on the way home (my call). But again, we're not dating! WTF?