Was he lying? And what should I do?

Okay so. I liked this boy and we were playing truth or dare and he picked truth, I asked if he would ever date me and he said yes. And then asked himwho he would date out of the whole group (him and three other girls plus me) and he picked me. That was awhile ago and we still Haven't dated.. He knows that I like him too. Does this mean that he really don't like me and was lying to make me feel better? What should I do?